1,373 reputation
514
bio website chiark.greenend.org.uk/~armb
location Cambridge, UK
age 49
visits member for 3 years, 4 months
seen yesterday

Jul
3
comment Interrupter (cross) brake lever cable guide wedges?
Park recommend against wrapping over the cables all the way up to the lever - parktool.com/blog/repair-help/in-line-brake-levers-cross-levers "Wrap handlebars. However, do not attempt to bring bar tape to lever as this may stress housing (Figure 8)." (Making up a suitable wedge would avoid the risk of stressing the housing though. Now I'm tempted to make something for mine.)
Jul
3
comment MTB with Road crank
You can get 46t and 48t Deore chainrings. Keeping the same crank and using larger chainrings might be better and/or easier than using a road crank.
Jul
3
comment MTB with Road crank
It'll depend on your frame. The problem isn't whether the bracket will fit, it's whether larger chainrings will hit your chainstay, especially when changing from a triple to a double moves them closer in.
May
19
comment Is it ok to mix 23 and 25 tyres
(Or, pedantically, tread pattern is useless, since slicks still have tread - en.wikipedia.org/wiki/Tread. e.g. legislation.gov.uk/uksi/1986/1078/regulation/27/made refers to "grooves of the tread pattern" but gov.uk/vehicle-maintenance-safety-security just uses "tread".
May
19
comment Is it ok to mix 23 and 25 tyres
While tread is generally useless on a road bike tyre, different tyres do use different rubber compounds with different coefficients of friction. Grip is more important on a front wheel, but most punctures are rear wheel, so while running narrower rear wheel is unusual, it's possible the tyres he happens to have make it the right choice.
May
10
comment What's a safer alternative to a flag for marking special bikes?
I was just thinking that buying something like that just for the Reach Ride was out of the question, but might be feasible if it could be reused. Maybe it could be used as inspiration for a DIY version though. I must have a look in my shed....
May
10
comment What's a safer alternative to a flag for marking special bikes?
@Mσᶎ - I was thinking of the way Bob's tailfin is designed to work as a sail in a crosswind, rather than being entirely free to pivot. paulworden.freeservers.com/Safety%20Sail.htm is a design inspired by it, but again I'd be dubious about it as a temporary attachment on a bike. A simpler rigid flag that swung round enough to not act as a sail could well work though.
May
9
comment What's a safer alternative to a flag for marking special bikes?
@Mσᶎ - Bob Stuart's tailfin is on a trike/velomobile, I think it could be tricky to adapt to a standard bike without a lot of work. Daniel - it's about 600 riders on the ride, so vests not visible from far enough away in crown is a real problem, but I also think smaller flags would still work. But it does ideally want to be something distinct from a standard safety flag.
May
7
comment Is it rude to take the lane, then filter when encountering congestion?
Yes. "It depends on local conditions" is the right answer. "It is certainly rude" is, in some conditions, just wrong.
May
7
comment DIY solution for carrying kids on a long-john: ideas?
Modern car child seats use en.wikipedia.org/wiki/Isofix. I think I'd second Chris' suggestion of a child bike seat. But just adding a neck support (and harness) to the box with ply seat as shown on the Bakfiets wouldn't be hard, would it?
May
7
comment Should the laws be amended to allow cyclists to run red lights?
movingtargetzine.com/article/… was a particularly bad example, the driver admitted looking for paperwork in his cab while turning.
May
7
comment Should the laws be amended to allow cyclists to run red lights?
Actually this is one place that cyclists passing a red light can save lives. Cyclist stops at a red light. Truck comes up behind/beside cyclist, puts cyclist in blind spot, and driver forgets cyclist is there. Lights turn green, both vehicles set off, driver swings left crushing cyclist against railings. If the cyclist sets off before the light changes, they can get clear.
May
7
comment Should the laws be amended to allow cyclists to run red lights?
aviewfromthecyclepath.com/2014/05/…
May
7
comment Should the laws be amended to allow cyclists to run red lights?
Some places do allow cyclists past stop lights in some cases without problems - bicycledutch.wordpress.com/2012/10/25/… theurbancountry.com/2012/11/bicycles-and-red-lights.html
May
7
comment Should the laws be amended to allow cyclists to run red lights?
That's a fairly common problem, but passing a light that isn't working properly after stopping is bit different from "run red lights" etatrust.org.uk/2013/09/…
May
7
comment Should the laws be amended to allow cyclists to run red lights?
lcc.org.uk/articles/… 'I remember saying to Dutch engineers: “Well cyclists don’t stop at the lights.” And they said: “Well what’s the matter with your design?”'
May
7
comment Is it rude to take the lane, then filter when encountering congestion?
If it doesn't make a difference, then they haven't gained anything. And if, as is common in congested stop-start traffic, the average speed of motor traffic is lower than that of cyclists, no they likely wouldn't have to do it anyway.
May
7
comment Figures on accidents involving cyclists where motorists are using cell/mobile phones
rospa.com/roadsafety/info/mobile_phone_report.pdf has some references, as does en.wikipedia.org/wiki/…, but nothing that would let you pick out specifically cyclists. And I doubt you'll find the UK ban significantly reducing accidents, because so many drivers ignore the law.
May
7
comment Is it rude to take the lane, then filter when encountering congestion?
Yes. A cyclist can see exactly how close his hands are to the side of a car, and can be sure a stationary car won't wobble, and that the breeze of their passing won't disturb the car. A driver passing a cyclist at a higher speed, with much less awareness of how close the outside of their vehicle is to the cyclist, and generally without realizing how a two-wheel vehicle behaves, is much less safe.
May
7
comment Is it rude to take the lane, then filter when encountering congestion?
If you don't take the lane, and get passed by cars only to be held up by them when it gets congested a few hundred yards further, then the car drivers have gained absolutely nothing, have possibly endangered you by passing too close, and are now holding you up unnecessarily. Avoiding that situation certainly isn't rude, and it is certainly rude of drivers to insist that you put up with that situation.