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| bio | website | chiark.greenend.org.uk/~armb |
|---|---|---|
| location | Cambridge, UK | |
| age | 48 | |
| visits | member for | 2 years, 2 months |
| seen | 3 hours ago | |
| stats | profile views | 5 |
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May 8 |
comment |
Which pulley is which on my Shimano STX RC derailleur? The "Centeron" is about the top pulley deliberately having a little bit of side to side float: sheldonbrown.com/gloss_i-k.html#jockeypulley |
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May 8 |
comment |
What's the efficiency of hub gears compared to derailleurs? I think he's saying that both lower efficiency and higher weight will "lose in performance", which is true, assuming a route that isn't totally flat and isn't almost all downhill. |
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May 8 |
answered | How much “play” is normal in a Sturmey Archer 3 speed hub? |
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May 4 |
awarded | Excavator |
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May 4 |
revised |
Dictionary of regional vocabulary differences (US vs UK) Seat post is UK too |
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May 4 |
comment |
Dictionary of regional vocabulary differences (US vs UK) I'm English and would count a pinch flat as a puncture, because it makes holes in the tube, but wouldn't count a valve failure as a puncture, because it doesn't. But valve failures are rare enough that a flat might be assumed to be because of a puncture. |
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May 4 |
comment |
What pressure should I run my Road Bike tyres at? Chart is from michelinbicycletire.com/michelinbicycle/… See also dorkypantsr.us/bike-tire-pressure-calculator.html |
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May 4 |
comment |
Chain guard for a belt-drive bike? A chain guard designed for a single speed or hub geared bike will be neater, and I suspect many will fit over a belt. But I can't point to a specific one of them that I know will fit with a belt (and there are some I'm fairly sure won't). |
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May 3 |
answered | Chain guard for a belt-drive bike? |
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May 2 |
comment |
Rear Derailleur Curled Up Have you got a photo? The description could be anything from just needs your chain length adjusting a bit and/or learning which gear combinations to use to being totally broken. (With intermediate "can be unjammed if you are careful, then adjust/learn so it doesn't do it again".) |
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May 2 |
comment |
What is the braking (stopping) distance for bicycles? Also bike geometry - on most bikes, the limit on braking is throwing the rider over the handlebars. On a tandem or long base recumbent it's skidding the front wheel. Both are "locking the front wheel", but the tandem/recumbent can brake harder before that happens. |
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May 2 |
comment |
How much “play” is normal in a Sturmey Archer 3 speed hub? Found one, and the pawls aren't engaging at all so it spins round in both directions with no drive :-( There's another one in the shed somewhere, with Dynohub. |
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Apr 30 |
comment |
Where should I sell my H.R. Bates frame? Kibbee, if you follow the link in his question, it tells you a bit about the "easily recognised Diadrant fork". I don't know where the best place to sell such a classic would be though. |
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Apr 30 |
comment |
Why are electric bikes so expensive? "As of yet there are no electric bikes that make use of the frame to carry the battery" isn't actually strictly true, but of course a non-standard frame raises the cost even more than a rack. A couple of examples: pedelecs.co.uk/forum/electric-bicycles/… turbo.specialized.com (The Specialized is newer than your answer, but I've seen others that were older (but not from such a well known manufacturer).) |
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Apr 30 |
comment |
How do I tighten up my headset? I wouldn't expect pliers used with care to do more than mark the knurled surface, and maybe not even that. But they should be a last resort. |
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Apr 29 |
answered | How do I tighten up my headset? |
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Apr 29 |
comment |
Checking spoke tension without specialized tools "Nipple driver". I made one with an old screwdriver and a file. It's only a convenient starting point though - and on a standard rear wheel you will want the two sides differently tensioned to get the dishing right. |
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Apr 19 |
comment |
Replacing thick wheels with thinner ones Note that thinner tyres that aren't fully pumped up will still be slow, and will be more likely to pinch flat than soft fat tyres. Thinner tyres can be pumped up harder in the first place, but the smaller volume means that losing a certain amount of air will make more difference than it would to a fat tyre. |
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Apr 19 |
comment |
Replacing thick wheels with thinner ones The main issue with switching to 451 is likely to be that the brakes (probably V-brakes) would then be in the wrong place. |
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Apr 19 |
comment |
Replacing thick wheels with thinner ones Those are unlikely to fit his existing rims: sheldonbrown.com/tire-sizing.html#width But since the question talks about replacing the wheels, not just the tyres, he can choose new wheels to suit. |
