Showing posts with label blow outs. Show all posts
Showing posts with label blow outs. Show all posts

Tuesday 19 March 2024

Spin Dizzy: Fresh Freehubs & Other Wheel Woes

Despite the rescue attempt, the Halo Spin Doctor’s Freehub had succumbed to pawl spring failure. Ison-distribution were characteristically incredibly helpful and empathetic, sending me a replacement the next day. I’m hoping this will be a long-term cure. However, I bought another XT hub as a precaution, while opportunity and favourable pricing presented. 

I’d been enjoying a succession of very mucky outings aboard Ursula, I succumbed to a sudden and unwelcome rear blow out and a minor wibble in the sturdy Sputnik/XT wheel. This ultimately meant a six mile walk home and led me to retire the basic but generally likeable Maxxis Ikon Maxxis Ikon Tyres | cycling-not-racing (sevendaycyclist.com) 2,500 mixed terrain miles down the line. Doesn’t matter how well built a wheel, or how sturdy your tyres, catch that sharp, or that hole with your name on it and something’s gonna give.  

 

A couple of riders slowed and offered help-as is the standard code for us and understood there wasn’t much that could be done at that stage-the spare tubes had also failed. I thanked them and we went our separate ways. I was mortified when a middle-aged woman stopped her Nissan Qashqai and asked if I needed help, or a lift somewhere. I was touched on the one hand and made clear I was grateful. However, I’m also very wary of people and their motivations and often find accepting help very difficult 


 

At that time, I also wanted to be alone with my thoughts and to reflect. I’ve replaced the rear Ikon for a Continental Cross King Shield Wall (26x2.3) which promises to handle well on most surfaces and a puncture- repelling belt also promises greater reliabilityI left Mick Madgett to work his magic with the Rigida/XT hoop and build another wheel based around an XT hub as a second/spare since opportunity presented and my faith in the Spin Doctor had waned. 

 

Though quite different, removing the spin doctor freehub cast me back to the old Maillard Helicomatic system from the early 1980s. I had one on a bike bought in March 1988 primarily for the frameset and ultimately, converting to a fixed gear. Rebuilt pretty much and racked up many miles in the four years of ownership. Daylight where head and down tube met signalled the end. I salvaged the good, transferable components and ported them over to a geared winter/training frameset in the summer of ‘92.  

I toyed with the notion of running it as a 1x6spd and bought another Helicomatic Freewheel- a very close ratio, knee-busting block, since that’s all I could find and in my impressionable teenage mind, it would be fine…Point being, it was incredibly easy to switch these blocks, compared to a traditional screw-on freewheel. However, it was one of those concepts that wasn’t fully embraced and ultimately, the freehub system became dominant.  

Perhaps unsurprisingly, it featured on some early 80’s Peugeots. I digress. I’ve decided it's now time to switch the Holdsworth’s BBB Razor for the Smanie GT137 saddle, which is 137mm wide, 257g and features hollow Cro-Moly rails. A little wider than the mighty Razor but may offer a little more support and, all right, I fancied a change, ahead of the Spring when hopefully the weather will be nice enough for some fast blasts.  

By that point, I’ll switch the fixed gear winter trainer’s KMC Z1 for the half-link Gusset Slink. For the uninitiated, the latter is a beefy model that will add some further girth but in my experience is great for getting chain length bang on and they’re super durable too. Despite suggestions, the Blub Ceramic has been surprisingly stoical despite some persistently wet, muddy lanes.  

I returned a good 280 miles in these contexts before giving the bike a seriously deep clean and deciding the gungy beard of mud and contaminant needed purging too. Having got everything respectable, I found myself spinning the wheels and discovered a very loose spoke.  

So loose that the nipple had retreated into the rim. I whipped off the tyre, tube, and rim tape, only to hear the nipple orbiting the rim and then vanishing. Never to be seen again. Another email to Ison and they graciously sent me some brass14g replacements. 

I overcame my 37-year fear of the spoke key (some might draw parallels with the android’s fear of the screwdriver cited in Channel 4’s 1984 tongue- in- cheek sci-fi drama “They Came from somewhere else”.) and wound a new one in, judiciously snugging the spoke taut, plucking the others to ensure uniformity. I’ve said this before, but this long-standing terror came from one summer afternoon in 1987 

 

Armed with a rather basic spoke key, a cherished copy of Richard’s Bicycle Book and a vague notion of turning the spokes, I got busy with my Holdsworthy Butler’s front wheel… Transforming the 3mm wibble into a samba dancing hoopSure, I’ve tweaked the odd nipple I desperation miles from home, but it was always with a sense of acute trepidation. Never trusted my own wheel building and over the years from chatting with other riders anecdotally, I’m not alone. 

Monday 5 June 2017

Carbon Fibre Repair









I headed down to Carbon Bike Repair in Leatherhead. A fascinating visit that dispelled many of the myths surrounding composites. Not least, their capacity for successful, permanent and moreover, cost-effective repair. You can read the full feature here https://www.sevendaycyclist.com/a-visit-to-carbon-fibre-bike-repair .
I was surprised to learn that 99% of damage is repairable on a good-as-new basis and yes, that includes dropouts. Obviously, economics are a determining factor.
Basic repair starts at £80, which is viable on a set of forks blades costing £300. Not so, a set commanding £100, let alone a £35 seat post with aluminium head.
This TT frameset was involved in a particularly gruesome collision with a car. One which ultimately claimed the rider’s arm and broke the frameset into 27 pieces. A bystander had painstakingly salvaged these, placing them in a bag.  
Ultimately, Rob’s team were able to piece it (including the fork!) back together. Rigorously and meticulously tested, it is structurally sound, the rider recovered and returned to racing. Perhaps unsurprisingly, they bought a new frameset and gifted this one to CBR.
Their 2pack paintwork is of phenomenally high standard too. However, there wasn’t a safe opportunity for me to capture this being applied, on account of the paints’ cyanide components. Another reason why manufacturers/refinishers seldom offer little bottles of touch up paint these days.
Shortly afterward, I headed north to work on unrelated photographic assignments, which also coincided with Coventry’s motofest. Oh and a commercial quality TIG welder with AC/DC settings…
TIG (Tungsten Inert Gas) is another welding technology that came about in the 1940s and a good alternative to oxyacetylene. It’s also credited with making aluminium and magnesium credible choices for structural works.
Much greater skill is required compared with MIG and the Arc’s intensity is also significantly higher; hence a grade 10 shield/setting and gloves are a must. However, the relatively slow, precise nature rewards with much cleaner, slag-free welds.
It can be used at any position and with the correct shielding gas, is highly suited to titanium and Cro-moly steels. Little wonder how it became so widely used in frame and component construction.
My involvement? All will be revealed another time…
Talking of TIG welded frames; having re-greased the Ilpompino’s headset and seat post, all was buttery smooth and serene. While hustling along the lanes this morning, my internal processes were shattered by a high-pitched “baaaaaaaaaaang!” This was swiftly accompanied by a shimmy; my senses screaming with alarm.
The rear tyre had rolled from the rim. Closer inspection revealed the tube wall had failed- caused by fatigue, rather than foreign object. Thankfully, fresh butyl and Lezyne Micro-floor pump https://www.sevendaycyclist.com/lezyne-micro-floor-pump spared my blushes.
The latter is capable of delivering a road credible 100psi fairly swiftly with only moderate, mere mortal effort. I limped home at 15mph with a wobbly rear hoop. That’ll be a trip to my friendly, local wheel builder tomorrow morning!

Friday 10 March 2017

Rub a Dub Dub My Bike Needs (Another) Good Scrub...











I returned from another water-logged blast and concluded it was time to get busy with the M16 Podium stage system kit. I’d allowed my cross-inspired fixer to become right royally encrusted in a week’s worth of silty gunk.




Wheels out for a deep clean, this was the moment to swap the superb Schwalbe Marathon GT for some much lighter 30mm, 120tpi Vee rubber Rolldiac.Yes, I was very excited and judging by the barking frenzy, so were the neighbour’s miniature Schnauzers. Either that; or they were begging their master to toss them a Marlboro.  


First up,  frame, transmission and contact points received a quick, cold-water rinse over before  I engulfed the bike under a richly deserved helping of that visibly subdued Extreme bike cleaner This was left marinating a few minutes  while I rounded up buckets and brushes, singing that Prince Buster classic “Whine or grine”. 


Afterall, if you have your brush, you can avoid the rush… As per the Univega, impacted grot literally fell away come the first  hint of a saturated sponge. More intimate areas were coaxed clean using the Pedros’ large frame and wheel brush https://www.sevendaycyclist.com/pedros-pro-brush-kit
 

God had decided to take an extended break from washing his two-wheeled fleet on Wednesday afternoon, so I progressed to the Pro Finish #2. This is basically a base coat wax, which will also consume any residual grime-spent chain lube and similar spots missed during the first stage. 


With that buffed; for the grand finale’ I applied their helmet & bike guard, which being completely free of silicone, can apparently be delivered to discs and other braking surfaces.

Calling their bluff, I did just that. 

 Inflated to 125psi (The Rollidac are good for 145, if you must), I reinstated the wheels, adjusted chain tension and gave the links a cursory cat-lick to purge any gritty contaminant. Slightly congealed TF2 extreme clung to rollers, and may last through to April and beyond. By that point, I’ll top up, or strip in favour of something lighter.

 I wasn’t remotely surprised by the pregnant pause as I progressively engaged the Tektro lever while trundling along at 5mph. Lever fully home while riding another hundred metres restored the stoppers original prowess. Therefore, minimise contact and test your brakes a few times before joining the Queen’s highway.



A quick drop of Green Oil slip https://www.sevendaycyclist.com/green-oil-slip-eco-lubricant  to cleat mechanisms and the Thudbuster’s bushings concluded the morning’s fun. I popped said machine and tooling away and returned indoors. 


Talking of green oil, they’ve just launched a kickstarter campaign to get their PTFE free maintenance spray into production. PTFE and its branded derivatives is used in all manner of non-stick applications from industrial lubricants through to cookware. Great for moving parts but particularly toxic to aquatic life and not particularly kind to us either. 


As with exposure to other chemicals, there are supposedly parameters of safety. Delivering a quick, shot of PTFE fortified lube to cables, cleat/derailleur mechanisms, locks etc presents minimal risk to us. 


Similarly, the occasional engine oil and filter change won’t greatly increase a motorcycle or car enthusiast’s risk of contracting serious dermatological condition or cancer. Provided of course, examination gloves and other preventative measures are taken… 


Pro mechanics who regularly ingest PTFE products orally, or through the skin do. We’re really looking forward to getting our hands on the Eco Spray lube. 


So, back to those those curiously named Vee Rubber. These feature a very subtle, dimpled tread reminiscent of a cross tyre that’s been sanded almost pancake flat at 667g per pair, they’re lighter than a single Schwalbe, although still promise optimum grip and longevity. 


The supple casings boast a very thin Aramid belt, which will hopefully deflect the most common invaders, although I’m not expecting the Marathon GT’s almost bullet-proof dependability…I’ve had one epic “Gunshot” blow-out (during our maiden voyage), literally tore the tube wall clean open! Good thing I packed that little Zefal pump too, since my Co2 inflator saw fit to prematurely jettison. We’ll see what the next few hundred miles bring before forming any firm conclusions.      

Lastly a seat post update.  After some problems with an online retailer busting the MT3 live centre component during the pick n’ pack phase, we’ve had a Eureka moment with the ti post project.....More next week. In the meantime, if wet legs on tour, or sullied office smarts are spoiling your commute, these Pro-Viz might be a winner  https://www.sevendaycyclist.com/proviz-nightrider-waterproof-trouse