Showing posts with label lubricant. Show all posts
Showing posts with label lubricant. Show all posts

Friday 13 November 2020

Concept Realised
















Back in March 1987, reading the now long-defunct “Bicycle” magazine, I happened upon the Muddy Fox Trail Blazer-in essence a mountain bike with drop bars, bar end shifters 1.75 knobbly tyres.. Aside from wanting that particular machine, it awoke a deep desire to build a concept machine. One that was lightweight, rugged, go anywhere (Ok, with some trade-off). Fast forward 12 years, countless miles, a degree and other trappings later..I happened upon the Univega frameset hanging in a friend’s shop window. It started off as a flamboyant red enamel bitsa- bits of this, bits of that-a Frankenbike, some might say.

Wheelset handed down from a racing mtb, Stronglight triple crankset from a tourer, drops from said tourer, 25.4 Kalloy stem, Kalloy seatpost, Shimano 600 rear mech, STX front, Shimano bar end shifters, first generation Shimano SPD pedals, Minoura four point 4130 Steel rack.

Its evolved quite considerably and racked up considerable mileages along the way. Ursula has been a trailer tug, winter trainer, daily driver, tourer and confident come sunny days or bitter snowy blizzards.

Save for the frameset, the only thing remaining of the original build is the front cable hanger. However, it has evolved to meet my needs and is incredibly close to the original brief. High power dynamo lighting, full guards, plenty of room for spiked tyres when things get icy 1x10 drivetrain (albeit more a’la carte than some would like). Throughout this evolution, suitable drops were the biggest challenge.

I experimented with a few road blends, changed the stem and then perfection in the form of these Soma Condor https://www.sevendaycyclist.com/soma  just the right shape, width and enable me to stay on the drops with no loss of control on, or off road. On-One Midge (in the 31.8 diameter) might’ve been a good budget option-I’d run them very happily for a good decade, or so on my fixed gear winter/trainer. However, I’d since sold the Midge on and gone for the Genetic D-Riser 16 https://www.sevendaycyclist.com/genetic-d-riser-bars and Soma Condor 2 https://www.sevendaycyclist.com/soma-condor-2-shallow-drop-bars  on the latter.

A while back, I had toyed with the idea of running Cane Creek Thudbuster ST https://www.sevendaycyclist.com/cane-creek-thudbuster-suspensuin-se , since the 3rd Generation short-travel unit was still available in 25.4 and with a suitably high quality shim, compatible with the Alpina 506’s 26.6 seat tube. At the time, I shied away from this (a) On the basis of cost-this was indulgence, rather than an inherent need.

(b) It was incompatible with the Carradice SQR luggage system https://www.sevendaycyclist.com/carradice-carradry  I was running at the time. Reasonable quality, perfectly serviceable aluminium alloy models to be found in this diameter and my experimentation was titanium was partially successful.

However, I had acquired some very inexpensive Chinese titanium, which was too thin in diameter for machining down to 26.6. Funny what happens when you’re not looking for it…Along came Cirrus Cycles with their Kinekt suspension post. They still offer a 25.4, thus compatible with a suitable shim.

Spring strength varies according to rider weight-ours is the medium, in accordance with my own 70 kilo frame. Some specifications. There is a carbon model but that wouldn’t be suitable for this application (or available in the desired diameter) hence the 6061 aluminium anodised version.

The Kinekt employs a spring/urethane elastomer system, offering travel between 0 and 35mm. Initial setup seems pretty intuitive and I’ve set mine on the firmer side-enough to take some edge off, without robbing too much power. Whether it will win my heart, like the Cane Creek Thudbuster ST remains to be seen…

They’ve kindly sent me a 90mm stem (7 degree rise), which I have earmarked for my fixed gear winter/trainer. Elsewhere, I’m being won over by this Showers Pass Men’s Elements Jacket, which not only keeps the weather out but there have been no issues with the inner fabric “sweating” as some 2.5 layer laminate models can. It also has a chameleon personality meaning it performs well on the bike without looking overly technical, worn with more casual clothing.

Lots of pockets-two at the hip, three internally continues this theme, although I am still very fond of the “Nelson” types. 15,000 breathability and waterproof ratings are well suited to longer, faster paced rides. 225miles in and the Zefal Ceramic Ultra Wet has clung on very tenaciously, despite November’s slimy conditions. Much as I expected, side plates sport a slightly grimy patina but it’s not overly grotty. Looking a bit filmy but still doing its thing.

Last but not least, here’s our review of the Pro-Viz LED 360 Vega Rear Bike Light. Well worth a look if you wanted a simple but effective two-mode design. https://www.sevendaycyclist.com/pro-viz    

 



 


Wednesday 9 January 2019

Magnetic Attraction






So, with freshly rebuilt dynohub wheel safely returned to me, and Univega waxed, following some mucky January mile munching, it was time to switch to fixed. 
Following frankenpute euphoria, you’ll imagine my dismay at a flickering and sometimes unresponsive computer display. Big fat flashing zeros are not cool.  
Let us be clear (as the present UK administration is so fond of touting). I had inserted fresh CR2032 cells, adding a slither of Vaseline to the battery contacts, nipped the sensor ties and magnet tight…Most probable causes isolated.
A seasonal Lurgy curtailed further diagnostics, but all seemed to be behaving normally. Both on the work stand and a subsequent mile long loop.
Three days later, back in the saddle, out along the lanes. Dynamo on, blinkies pulsing, erratic readouts... So, I switched the Trelock LS 906 https://www.sevendaycyclist.com/trelock-ls906-dynamo-front-light  lamp off. Consistently accurate, precise readouts resumed. Fluctuations gone.  This remained the case, over two rides and 45 miles.
I’ve never experienced these symptoms with my Univega’s Ultegra, or elderly Nexus hub dynamos. However, Strong magnetic forces, such as those experienced around power plants, and pylons are notorious points of interference. 97.6mph along a long, straight road, anyone? 
 I am also advised Shutter Precision hubs have particularly strong magnets.
Carbon fibre can also prove conductive, which is why good quality greases/assembly pastes must be used on metal components, to avert risk of galvanic corrosion/seizure. Bottom bracket threads being prime candidates. Could it be that the wonder weave, is amplifying said magnetic field, and creating these irregular signals?  
This may dictate moving sensor and magnet to chain-stay and rear wheel. Doing will exhaust computer and sensor cells a little faster. But provided I don’t exceed the 1 metre rule, everything should play nicely.
A wired unit is my last resort. Aside from defeating my “make do and reinvent narrative”, I’ll need to be more mindful when performing headset strips, and similar maintenance.  Blackburn have advised they no longer keep spares for the Atom units and, surprisingly, have deleted computers from their range.
Another rummage through the bodge box unearthed this VDO M3 WL, which appears to have a sensor fault. I’ve tried all the above techniques, but they won’t play nicely. Nor any other brands, for that matter, so I’ve emailed their UK importer for help. 
Despite constant headlines threatening a second ice-age, the thermostat has hovered around a seasonally typical 5 degrees.
No call for spikes just yet, although the wind chill prompted donning of Northwave Balaclava, once or twice.  These Oxford bright 4.0 gloves https://www.sevendaycyclist.com/oxford-1
have also come into their own and Steve’s been impressed by Proviz Reflect 360 CRS Plus Jacket https://www.sevendaycyclist.com/proviz-reflect360-crs-plus-jacket  
Chainsaw oil is continuing to do the business and some 140 miles in, is probably the closest to a bike specific, wet lubricant. I’m bargaining 500 miles from a single application. On paper, it’s looking a costlier option, compared with the bargain basement 5w/40. However, the latter attracted more scuzz. Most apparent within the cassette.
There’s been some further perch swapping, courtesy of this Pro Turnix gel saddle, which now graces my fixed gear winter/trainer. Its Selle Italia Novous boost superflow has been ported over to my tubby tourer and I’ve earmarked the BBB Echelon, elsewhere. Possibly the Goldhawk Roadax, if I can’t live with its stock/OEM model.