Showing posts with label Sprockets. Show all posts
Showing posts with label Sprockets. Show all posts

Thursday 27 June 2019

Diversions & Fixations












Due to the sheer demand for Maldon Shot Blasting & Powder Coating's expert services, my trailer and TIG welded forks blast n' paint rebirth, has been postponed. One of those things. I'd never ask anyone to work beyond their capacity. I wouldn't welcome it, so why would anyone else!
For some reason, the Halo Fixed-G https://www.sevendaycyclist.com/halo-fixed sprocket's lock-ring, will not stay tight, subsequently, the sprocket moves along the splines. This would partly account for the annoying, low level chatter when riding across anything other than virgin tarmac.
Then of course, there's the selection of loose fasteners, zip-ties etc residing in the Carradice SQR Tour's side pockets. Lived in patina aside, mine's still looking great, 18 years on and is arguably the best option for my (general riding) needs. Big lock, tools, change of clothes/shoes, tubes, food and tooling- easily swallowed.
The only minor consideration is weight distribution. Laden anywhere close to their ten kilo capacity, the SQR and its Carradry cousin  https://www.sevendaycyclist.com/carradice-carradry    can be something of a handful. That said; it’s a characteristic that I became accustomed to, and accounted for, within a matter of rides.
Back to sprockets...For the time being, I've gone for this 15-tooth, Andel Threaded Cro mo track unit-mounted on the hub's threaded side (obviously). Given these get the lion's share of dodgy water, salt and other detritus, greasing the threads with a suitably stiff grease, is essential. In this instance, I've opted for a ceramic, to avoid galvanic union later on.
I prefer ceramics. Durability and to some extent cleanliness being the main draw. However, a synthetic PTFE fortified prep will be fine, even on Titanium/aluminium interfaces. Old fashioned lithium greases are also fine...Provided you are pairing an aluminium alloy sprocket and hub.
I've also forgone the lock ring- for now. Lock rings are a sensible move. However, I find, even given a liberal greasing, the forces placed upon a fixed transmission, ensures sprockets get wound on very tightly.
Harmonious swoosh restored. I would be interested to try Level Components "bolt on" system, which in theory, should be the most secure going, albeit another demanding dedicated  sprockets.
What I’d expect, from a straight cut, CNC machined example. Bevelled sprockets have their place and tend to be relatively cheap. Hence their popularity on road bikes, converted to fixed. 
Overcast, slightly oppressive humidity has been the climatic theme these past week, or so. Nonetheless, I've managed to get out, and really let my hair down on the Holdsworth. No word from Apeman regarding the sheared A80 casing and mount. For the time being, video falls exclusively to my Tom Tom Bandit, which is beautifully intuitive to use. 
Though slightly quirky, the swoopy Soma Condor drops and Tektro RL520 lever are proving inspired revisions. Revisions offering improved control, both in terms of leverage and braking. The bars shallower drop ensures I can hunker lower than with the pursuit type.
I liked the Highway1 handlebars, too https://www.sevendaycyclist.com/soma-highway-1-handlebars. Another relatively shallow design but one that felt deeper, probably given I was running a TT type lever, at the end. I spend much of my time on "open" roads and relatively quiet lanes. Thus, this voluptuous genre, are a better fit. 
The Tektro RL 520 and Miche dual pivot calliper are a decent marriage, offering lots of controlled bite. Enough power to lift the rear wheel, so not something I'll be looking to upgrade. No call for a rear brake, unless you run a flip-flop (Fixed and freewheel setup) or live in a really mountainous region (at which point, you probably wouldn't be running a fixed, or single speed setup).
Other contemplated revisions, include the Crank Brothers Cobalt 3 seatpost, in favour of this Genetic Syngenic https://www.sevendaycyclist.com/genetic-syngenic-seatpost . While I love the Cobalt3's inline design, svelte profile (250g for 400mm, anyone?) I'm less endeared by the single clamp. One that is fiddly to adjust, and more prone to slippage, compared with other designs. Single bolt, or otherwise.   
Aside from the greater leverage/control, wide bars also open the chest cavity, which assists breathing, and of course efficient climbing. Gearing between 76.1 and 81 inches, is arguably bang on, for most road contexts.
Tall enough for maintaining a steady 20mph, without grinding up the gradients, or spinning out on the descents, like a demented, caffeine-fuelled hamster.  Talking of which, check cleat health regularly. Unplanned disengagement at 25mph plus is a very unwelcome, and potentially painful and expensive experience.  We have become very accustomed to a fantastic system of universal healthcare, here in the UK.
As is to be expected, given its enormity, there are sections of the NHS that would merit improvement, However, the present political administration seems determined to dismantle, in favour of a US-style, insurance-based system.
Combine that with a public happy to share their DNA, in order to "discover their ancestors" and "heritage", it’s not difficult to see how an insurer could test for genetic susceptibility and increase premiums (or indeed, decline insurance for certain conditions). This would also have implications for other things, including mortgages, and related premiums.