Showing posts with label cantilever posts. Show all posts
Showing posts with label cantilever posts. Show all posts

Monday, 22 December 2014

Logistical Redemption & Festive Threesomes









Hmm, perhaps someone in the logistics industry was reading my last post-those Tenn gloves and overshoes have just arrived-along with this Stronglight Aheadset.

Made from neatly machined 7075 aluminium, it boasts annular (as distinct from ball, or needle roller) bearings. Arguably, the latter are equally suited to touring, tandem, trike and similarly high stress applications thanks to broad surface areas.

Will be interesting to see what (if any) difference these make, especially at the lower race. I have previously employed the French marques’ justly popular and similarly priced threaded A9 model with more traditional touring builds.

Trouble free for many thousands of miles; I’m hoping this unit will follow in its footsteps. Lip seals promise similar defence against moisture/ingress but other factors; including correctly reamed and faced head tubes, sympathetic installation using stiff greases is equally significant.  Fitting’s earmarked for that quietly industrious, contemplative corridor between Christmas and New Year.

According to folklore, things run in threes. Freehub was first, headset second and this week, its otherwise dependable Dia Compe rear stoppers got the sulks and couldn’t be cajoled back to civility.

Regular readers will recall my predisposition toward front braking, reasoning that 80% of our weight moves forward. However, legalities aside; I’m firmly of the mindset that if something’s fitted, it must be functional and preferably finely honed.

Often a judicious blast of PTFE based spray while repeatedly pumping the lever cures matters. No joy…Closer inspection confirmed the frame’s pivot points were clean and completely free of corrosion. In fact, they still sported a protective layer of ceramic grease, comparably spotless springs too. Yet the left wouldn’t return for love, money or kind words… 

While having a thorough clean, sweep and tidy of the garage (as stipulated by one’s maternal figurehead during her most recent weapon’s inspection), I happened upon these wide arm units that once adorned the Ilpompino’s seat stay bosses.

Mechanical efficiency is greatly superior to low profile designs, although more extreme versions can present compatibility issues on smaller frames, especially when large panniers and generous feet enter the equation.  

Fresh cable, a lick of lube and ten minutes light fettling later they were pride of place. Reliable service resumed with discernibly superior modulation and feel-huzzah!

Talking of braking, I’ve always been a fan of the much maligned U brake. Sure, its low slung location had dire consequences for mountain bikers venturing beyond arid, dusty trails but I was impressed with their power and believed it had much wider horizons.

Decathlon would appear of similar opinion judging by their Alur 700. An unusual move since discs have stolen the show on road biased builds these past few seasons. However, this configuration was chosen to improve clearances, thus entertaining 28mm tyre sections, which can deliver a more compliant, sure-footed passage over wet, greasy winter roads. 

Suspect said stopper will require more frequent cleaning/inspection given its likely to be blasted with that slimy, sludgy and sometimes salty cocktail, mind.

Right, well my extra powerful 1700watt vacuum cleaner has just this minute expired-the fourth thing in a row (!) Best pack bags, head off to the midlands, watch some grass roots ‘cross racing and spend Christmas with very special people.






Monday, 2 June 2014

Twaaang! Aka Way of the Exploding Cable Hanger










Yes indeed, having returned from another head-clearing blast along the back roads, I was gently sweeping my Ilpompino back inside the garage when serenity was rudely interrupted by the faintest sound of binding…

We hadn’t encountered any holes or similar rim worrying phenomenon, so I presumed it was just a sticky inner wire. Pumping the left Tektro lever saw induced a faint tinkling as the tiny little pressed steel cable hanger expired, blowing itself into oblivion and inducing that sudden, monumental loss of cable tension.

Stunned silence was replaced by mild irritation-fettling aside; I’d literally engaged its rear stopper three, maybe four times in the last eight years. Initial thoughts leaned toward buying another Surly “braker” unit (as fitted to my Univega) but since the law only requires fixed builds to run a single, lever operated brake, I decided this presented the ideal opportunity to forgo it completely. Not so the braze-on posts. Some folks love nothing better than taking a hacksaw to their framesets but I like the option of reintroducing stuff should need, or fancy take me. They might also make brilliant blinky mounts...

A quick rummage in the spares drawer resurrected this resin Tektro stoker/dummy lever, some grey primer and my long T handled 5mm Allen key. Despite being well maintained, I was surprised at how arthritic the wide arm cantilever’s stainless mounting screws had become and momentarily envisioned strip-city. Having bypassed this grim narrative with a timely shot of release spray and severed the inner cable, things breezed together pretty smoothly.

Despite being previously repatriated and increasingly weathered, the Spa cycles leather handlebar wrap rewound sans protest and having wiped the bosses clear of residual grease, it was a question of either applying a thin, protective layer of polymer lube or, in this instance a thin coat of grey primer topped off with some of this Sugru “form & fix”.  

For the uninitiated, these are thin sachets of self-setting, flexible rubber that, until cured have a texture broadly similar to play dough/plastercine and can be moulded in much the same way.
Achieving smooth, even effects takes literally forty seconds or so, though seems to require a few hours unmolested to cure fully. Paint protectors are an obvious use, though ours has also been employed as replacements for mudguard (fender) stay caps, resealing electrical cables/dynamo wire etc.

Having double checked lever symmetry, reinstated and sealed the cowhide wrap, taking this opportunity to substitute the fetching but only moderately secure wooden plugs with some tap-in composites On the home straight, reinstating those canti-bolts with some Teflon prep the back door sprung open. It was Joshua who, to my astonishment proceeded to tell me this Dualco unit must be a “vacuum primed” design. 

Upon my affirmation, he then explained the mechanical principles behind them-correctly (!) Somewhat fond of deviating from the stock strip when it comes to degreasers and similar grime busting potions, I’ve just taken delivery of this three-litre dilute to taste concentrate from chemicals direct.


Hmm, familiar orange hue, “safe on all surfaces”, not for human consumption etc, interesting aroma too…I’ve a few sneaking suspicions about its potential hostility towards delicate anodised and indeed, flamboyant wet-spray finishes but let’s see how it behaves in various strengths and contexts before passing judgement.