The mystery of the dormant dynamo

 

Once upon a time, dynamos needed voltage regulators to prevent bulb implosion that was a very common issue when tandems and long descents. I was surprised to discover a pronounced lack of illumination from the long serving Exposure Revo lamp. Thankfully,  the Gaciron Cetus 1700 Gaciron Cetus 1700 Underneath Bike Light | cycling-not-racing was playing backing singer. Most dynamos are very reliable these days, but we only need a snagged cable, or some other issue to plunge us into darkness, possibly many miles from home. For these reasons, I typically have a secondary high power rechargeable torch type along for the ride.

The mount remains permanently attached to the bars, the light typically secreted inside a bar bag, or similar bike mounted luggage. Having returned, I pondered the possibilities. The lamp itself, though thirteen years old and exposed to the worst the lanes and trails could throw at it, very well sealed from the elements and had never been subjected to jet washing, or similar abuse.

The cabling also seemed fine. No obvious signs of wear, or damage.  That left the Shutter Precision SL9 hub. The terminal block, spring contact possibly? The hubs themselves are well sealed and turn on cartridge bearings that in my experience, run for 20,000 miles before getting the grumbles.

Before getting deep in the diagnostics, the easiest thing was to switch back to the Shimano Ultegra unit. I’d already decided that I was using the Sl9 wheel as a second/spare so would not get the hub’s electricals repaired, simply run it as a traditional front wheel. Repair would mean stripping the wheel and returning to Shutter Precision in Taiwan.

I’m fond of these units, but I’ve found Shimano are more cost-effective long term. Not least since basic servicing, such as bearing replacement is within the means of home mechanics and decent shops.  The switch coincided with returning from a mucky ride to discover a slow flat caused by a tiny sharp, most likely a hedge clipping.

Tube switched, pin hole patched and a deep, sudsy bucket clean followed. Switching wheels and giving the wheel a good spin, I was relieved to find the Revo lamp coming to life. While the Weldtite All Weather lube Weldtite All Weather Lube | cycling-not-racing was turning a little filmy, it was holding on, so I decided against topping up, not least since the KMC X10 was coming to the end of its life.

Plan was to run the chain out, switch and either apply some more All Weather, or something similar, should it land on the test bench.  Having washed, waxed and dried Denise, I’ve decided to switch to Muffin, since the weather is progressively wetter. Mudguards and a simple drivetrain being the obvious practicalities, although the geometry and stout buxom rubber makes for engaging, yet predictable handling, not to mention a magic carpet ride. Perfect for general riding, these characteristics come into their own during the darker, slippery months.  The M Part Primo Anti Slip Silicone Gel Bar Tape M Part Primo Anti Slip Silicone Gel Bar | cycling-not-racing is still impressing with its damping and reliable all-weather grip. Then of course, I want to get some more miles in with the Sigma Buster1600 and RL150 lights. Steve’s been impressed with its 800lumen sibling Sigma Buster 800 and RL150 Light Set | cycling-not-racing  

Autumn well underway and another year wiser, I’ve decided to drop Muffin’s gearing slightly, no sense straining the knees, or other joints- another Arundel fixed sprocket since these seem accurately machined, well finished and modestly priced. I’ve gone the electroplated, rather than stainless route on the basis of price, although the latter might repay the investment on salty winter roads.  

I’ve been pondering suitable substitution for the Silca Nastro Piloti Silca Nastro Piloti Bar Tape | cycling-not-racing which performs really well on the tarmac and excellent connection with the bars-a good bet for long steady audax miles, possibly winter training too, although in  my view, a bit pricey for the latter. However, given I like to play in the dirt regularly, damping was also a priority.

Enter this Ergon Orthocell. Apparently, it’s made from a medical grade material that’s also employed in their saddles. This is designed to distribute pressure evenly, thus insulate against intrusive vibration, and ultimately fatigue in the hands, arms and shoulders. In common with others, an anti-slip coating to counteract sweaty hands and torrential rains. Whether these qualities also improve grip and control when the temperatures tank, remains to be seen.  

Two Deore & Fresh Cable

 

Three rides in and I concluded a slight kink in the rear derailleur housing was causing mischief-it wasn't obvious, until I was cruising on the hoods and happened to take this shot.  I obviously replaced the outer and inner cables upon returning home.  Little surprise that shifting became that bit snappier and free of phantom shifts and similarly unwelcome distractions.

Even if bars look comparable, width and shape can influence things, so if changing contact points, or making wider changes, it's worth changing the cables, ideally during, rather than afterward.  Talking of bars, here’s Steve’s review of the Lomo 3 Litre Handlebar Bike Packing Dry Bag Lomo 3L Handlebar Bikepacking Dry Bag | cycling-not-racing

All part of bedding in, dare I say bonding (deeper) with the build. Not one, but two Deore mechs arrived, which is welcome. The SR Suntour fitted to Ursula is box fresh and the STX adorning Denise’s downtube still has plenty of strength in its spring. Nonetheless, it’s thirty years old and these things tend to expire at the least convenient moment. Both Deore hail from the same era but have little signs of use and plenty of power within their springs. 

I'm sticking with the Shimano CX50 stopper up front since there's plenty of bite and pads are readily available. Temptation was to pop another Kore on, but this is change for change's sake.

Mick Madgett has worked his wheel building sorcery and built the older, non-disc Ultegra dynohub into the Ryde Sputnik rim. Not an urgent job but glad its sorted. I've switched the existing disc braked Nexus Shimano Nexus DH-UR700-3D Dynamo Hub | cycling-not-racing over to Muffin and run the low drag Shutter Precision SL9 HALO EVURA & SHUTTER PRECISION SL9 DYNOHUB BUILD as a second/spare, as need arises. Otherwise, I'm really pleased with the bikes in their present guises.

Denise's 36/26 is actually quite close to the "cut down" trend that struck in the early 1990s, where riders would often forgo the big ring (typically a 48 tooth) in favour of the 38 and 28 since this saved a few grams and was arguably more practical off road. Though there's a lot to be said for triples, especially on a tourer, I've found keeping them on song four seasons round to be something of a chore.

I also ran a Shimano 600 with a Stronglight 48/38/28 setup, and this could also prove temperamental. I should point out this was inherited with the bike, not of my doing and was ultimately replaced with a Suntour XCD six months after the frameset's powder coat makeover in March 1990.  I was a big Suntour fan and remain very fond of the late 80s and early 90s groupsets.      

Elsewhere, I fitted the Blackburn Atom SL computer to Muffin and though accessing the battery compartment is fiddly, thanks to the tiny screws, the rest of the unit, including sensor feel solid in the Blackburn tradition. The display is very clear and the switches similarly solid. Not quite as bombproof flavour of old school, late 80's Cat Eye, but not far behind, so we'll see. 

 

Staying with Cat Eye a minute, I was interested to note they still offer wired versions, including one called the Enduro, which is apparently designed for off road duties. I'd go for a wired model since by definition, they are the most accurate, reliable option, but there's the risk of me embarking on a headset strip/similar, forgetting about the wiring and ultimately knackering it. I've got form for this, having done it before, to a Strada back in 1994.  I spend considerable time connected to the internet in one form or other, to the point where I simply want to decompress and disconnect on my rides- escape, for want of a more involved explanation.  

 

The Lomo Mountain Bike Gloves are still seeing plenty of action and continue to impress in their pleasant, understated way. Also on the test bench is the Lazer Strada Kineticore helmet, a design that blurs genres.

It employs their ScrollSys system for a precise, 360 degree fit, TPU eyewear docking system for parking sunglasses, a rear light mount and Keneticore Propriety Integrated Rotational Impact Protection, offering protection in a similar manner as MIPS. Where the two systems differ is Keneticore Propriety Integrated Rotational Impact Protection is built into the helmet from the beginning, whereas MIPS is added afterward. This ensures it covers the entirety of the helmet and theoretically, improves ventilation, while also using less material.

Hopefully none of us will ever need to call on this, or rely on our lids, but twisting forces can prove particularly harmful in a crash.  

Build quality and attention to detail impresses me at this price point. Simple things like the polycarbonate shell extending around the rim and an intuitive "conveyor belt" type adjuster tightening or relaxing the cradle tension being prime examples.

On the subject of sizing, I went for a small, finding the medium can be a little larger than others. I'm at the upper end of the 51-56cm circumference but still achieved a secure, comfortable fit with scope for caps, buffs and similar headwear. Our sample also coordinates nicely with these Shimano RX600 Shimano SH RX600 Gravel Cycling Shoes | cycling-not-racing and cap 

Revisions & Regaining Trust

 

I’d found myself a little tentative, following the blowout and subsequent long walk home with Denise. Rationally, I’d switched the tube, replaced the rim tape- both fresh, so no reason I’d succumb to a mechanical. I’d also given the cassette and chain a good clean, stripping the Peaty’s Link Lube All Weather for its dry counterpart. The chain was worn to .5, so still had some life, maybe three hundred miles, depending on conditions.

Against this backdrop, I’d decided the best tactic was to pop out on a shorter evening loop-8 miles, taking in some gravel and rougher roads, ruling out any tyre, or tube issues and also getting a better idea of how the big wide, swoopy WTB bars would improve control in these contexts.

I’m still very fond of the original Soma Condor TEST: SOMA CONDOR HANDLEBAR and would recommend them to those seeking a shallow reach drop, whether it be a cyclo cross, touring, or drop bar mountain bike. However, the WTB Mountain Road Drop definitely have an edge on the control front off road. I’d forgotten how good they were and so glad I kept them. On-One’s Midge were another surprisingly good budget buxom bar and these were also available in 25.4 and 31.8, catering for old school mountain bike stems and obviously, more contemporary models.

The larger diameter was less whippy, giving a more direct feel on the road but without feeling harsh off road. Aside from the control factor, flared drops open the chest cavity further, improving climbing prowess on longer ascents, which is something I’ve traditionally enjoyed on the fixed gear winter trainer.

However, I’ve settled to subtle riser drops, these Genetic D-Riser 4 GENETIC DRISER 4 HANDLEBARS | cycling-not-racing have struck the best balance for road duties, their D-Riser 16 GENETIC D RISER 16 BARS | cycling-not-racing arguably win by a nose if gravel, cyclo cross and possibly trailer tugging duties are your primary duties.

The other advantage the Genetic offer over the likeable Soma is uniform diameter across the top section, meaning accessories are easier to fit.  More subtle designs such as the Genetic also have an advantage when riding into headwinds, given the narrower surface area.      

Five miles under the tyres, turning right along a section of disused airfield I began to relax, engaging with the evening sun and letting rip. Though I hadn’t intended to change the bars, this proved an inspired choice and sensibly undertaken when the bike was already awaiting minor work. I’ll switch the Leatt Endurance 6.0 over to Denise and the M540 back to Muffin.

The Leatt 6.0 have proven very impressive on the fixed. The Cro-moly axles and 6061 bodies provide a very rigid, supportive platform, which was particularly apparent when climbing out of the saddle or otherwise accelerating hard. Obviously, Muffin’s relatively lofty bottom bracket and 165mm cranks help, but there’s generous clearance, so no fear of grounding a pedal during enthused cornering. The black anodised finish is also wearing well with the regular clippings in and out. Bearings are not only incredibly well sealed but employ needle and ball bearings.  It will be interesting to see how they fare off road.    

Staying with off road rubber a moment, here’s my review of the CST Patrol CST Patrol Folding EPS Tyres | cycling-not-racing

I’d had Muffin’s Giant Continuum 9 Wireless Computer head unit go rogue. Changing the CR2032 cell seemed the most obvious solution-the sensor cells can go with little warning, regardless of whether premium or generic cells are used. I always apply a thin lick of Vaseline or silicone grease to the contacts, optimising connectivity, while sealing the elements out.

However, the head unit would not calibrate correctly, so I decided to salvage what I could- CR2032 cell, fork sensor and silicone casing, since Ursula and Denise still run them. I’ve had a year’s service out of it, and some might say my £9 worth. I spotted some NOS Blackburn computers and went for a pair, just in case another of the Continuum should fail unexpectedly.    I’ll close here with this review of the Velo Tool Mini Adjustable Torque Wrench Velo Tool Mini Adjustable Torque Wrench | cycling-not-racing

    

 

Muffin Racks up The Miles

 

Having tweaked the chain tension and tightened the ring bolts to 10nm, I was feeling more confident with Muffin and keen to gently rack up some miles to bed everything in properly and possibly reflect on further modifications/upgrades. Frankly, I’d built with everything I’d intended, rather than older parts and compromises.  Consumables such as chains, sprockets and bar tapes will be replaced but nothing major.

After some deliberation, I found myself pruning the chain by two links, sliding the frame forward in the dropouts and getting the chain play to 1/2inch, which is the textbook suggested ideal. I also found myself replacing the inner brake wire, then dialling in the TRP Spyre, which improved stopping somewhat. Presented the ideal opportunity to play with the Park torque wrench some more.  Simple tweaks can often make huge differences. I also run a little scrap butyl where the frame fit pump rests against the top tube’s underside, protecting it from unwanted rub and ultimately, paint damage.

Though the V2 was always fun and predictable, Muffin’s bigger clearances, improved lateral stiffness and general modernisations make for a very well-balanced machine with a magic carpet ride-especially with the Continental. These clearances also mean I can run 35mm Schwalbe Marathon Winter (spikes) during the darker months. Features that better suits my riding style. That said, I remain fond of the V2 and its geared, first generation Kaffenback (Think Café’ & back) cousin (which would also take 32mm tyres including mudguards). Think winter/trainer cum working bike, although some folks report theirs were reliable lightweight tourers- I can well believe it.

Talking of small jobs, shoe cleats are often neglected, and these Shimano had served me very well but were showing obvious signs of deterioration. Mercifully, the bolts, though slightly arthritic came away with a quick shot of Muc-Off MO94 Muc-Off MO94 Multi Use Spray | cycling-not-racing. I had thought one wasn’t going to budge, calling for the drill bity but thankfully this also shifted with a T25 Torx. I instated the new Leatt cleats with a liberal helping of Oxford Toque Assembly Grease Oxford Mint Assembly Grease | cycling-not-racing and torqued them to 4nm using the Velo Tool Torque Wrench.

 I’d also been keen to test the effectiveness of some degreasers on waterproof grease. Ironically, Ursula’s Shimano XT seemed slightly reticent to budge. A quick shot of MO94 helped with this reticence. Some Park Tool PL1000TESTED: PARK TOOL POLYLUBE 1000 LUBRICANT FOR BICYCLES still remained on the threads, which is impressive, since it had been a year or so since I removed them. I treated them to a modest helping of degreaser, reinstating them with a liberal lick of Oxford Torque Assembly Grease. 

Ursula and I have also been enjoying further exploratory meanders far from the maddening crowd. The CST Patrol is running behind, the Continental Cross King Black Chil up front. There’s a method to this, primarily since the CST Patrol are slightly narrower, thus giving greater clearance at the rear triangle. The Patrol are also 80g heavier than the Cross Kings and I’m wondering if this has any connection to the EPS (Extreme Puncture Safety) belt, which is 4 on CST’s scale. It also allows me to compare rolling resistance and similar performance characteristics.

 I’m genuinely impressed by both at the moment and in similar contexts, although there’s a substantial price differential between them. The Patrol (at least in 26inch guise) aren’t tubeless ready, which may be a consideration, nay dealbreaker for some. I can appreciate some very palpable advantages of tubeless setups but on balance, still prefer tubes, whether the humble butyl, or TPU.   

 Either way, both tyres are providing a dependable, compliant ride over some very badly surfaced gravel roads and farm tracks. Longer excursions also confirm I’ve got Ursula’s saddle height absolutely right.      

      

 

 

Shakedowns & Subtle Tweaks

 

 Built, checked and tweaked, it was time to take “Muffin” the Mulo for a quick 15mile shakedown ride. I’d erred on the side of less chain tension with a view to dialling it in, rather than too tight.

Perhaps unsurprisingly, given my switch to 40mm tyres, the ride quality was much smoother, though it wasn’t difficult to coax “Muffin” up to speed and keep on the boil- 41cm chainstays certainly help. The front end also feels more responsive, without being twitchy, and the frame’s lateral stiffness is also an improvement over the otherwise very loveable V2.

Predictably, I needed to tweak the Aheadset bearing tension and found myself switching the TRP Spyre for its loftier SLC stablemate, having given the calliper a good clean and replaced the pads. Three rides in and I detected the ring bolts needed snugging down slightly. A small, insignificant job…

However, my Park pattern tool that holds the collar still while you tighten the 5mm/T30 Torx bolt wasn’t arresting the collar properly. This prompted purchase of a T handle design from a well-known London bike dealership that I frequented regularly when living in the capital.

Given it was a bank holiday weekend, I had to wait a day or two, which presented an ideal opportunity to hop aboard Ursula and get some miles in on the Continental Cross Kings. Having enjoyed a frolic through the forests, I found myself being chased by an incredibly determined goose. Mercifully, I was able to outpace-either that, or the goose recognised I wasn’t a threat.

550 miles racked up with The CST Patrol, I’m generally impressed by their capabilities as wallet-friendly all-rounders, although I’ve noted the Continental Cross King Black Chili require less effort to coax up to speed in comparable contexts/conditions. Puncture resistance, specifically vulnerability to hedge clippings and similar sharps was an issue I’d had with earlier incarnations of the Cross Kings, so it will be interesting to see how influential the Black Chili compound is. While testing the CST Patrol’s prowess, I happened upon a completely deserted stretch of unmade and sometimes quite technical gravel road.

I’d had a quick exploratory hoss along the bridleway on previous occasions but was deterred of further exploration due to farm traffic and general agricultural activity. The Patrol coped handsomely, offering excellent traction, control and indeed cushioning over the lumpy, bumpy and sometimes pot holed route, which ran for a mile or two.    

I’d also switched from the Motorex Wax Lube to Peaty’s Link Lube All Weather courtesy of Dynamic Bio Drivetrain Detox. The Link Lube All Weather is best thought of as a bridge lube for those conditions where you want something more substantial than a wax, or dry formula but with a friskier shifting and feel than traditional middleweights.

Wax chain lubes may be less stoical than other types, but in my experience, they can congeal quite stubbornly, particularly on rings and cassettes. While the Dynamic was visually engaging and crucially stripped the rings and cassette clean with nominal effort, it was slower acting than some degreaser stocks I’ve evaluated over the years.

Water must be applied to the hosts beforehand and The Drivetrain Bio Drivetrain Detox left to marinate for two to three minutes, so one of those formulas seemingly best suited to holistic bike cleans, rather than situations where the bike’s fundamentally clean, but you just want to change lube.  It’s also reckoned sufficiently potent to strip waterproof greases, so we’ll see. 

Back to “Muffin” Chain ring tool in hand, I whipped out the Park Tool Wrench, dialled it up to 10nm, introduced the crank bolt tool-Huzzah! Another little job done. Talking of torque Wrenches, here’s my mini budget model group test Three Budget Torque Wrench Test | cycling-not-racing