Pete Biggs wrote: [MTBs in the UK]
Quoted message said:Because they're commonly available and cheap, and robust. They're especially good in hilly towns
as well.
They're commonly available from the rules of supply and demand. They're cheap partly from same but
partly because stack 'em high, sell 'em cheap is apparently the best way to sell bikes here. It
doesn't work for cars used as utility transport because people use cars enough to know that there is
such a thing as a false economy. The same perception is not as wide for bikes. They're not
"especially good" in hilly towns. I have an MTB and a 3 speed Brompton and I live in a hilly town.
The only time I use the MTB is offroad, because it's more work on them than the Brompton. The low
gears on MTBs are for insanely steep things on marginal surfaces and there just isn't any point on
an urban bike. It's just more stuff to spend money on unnecessarily and have go wrong.
[crouch position]
Quoted message said:Not that much. Bolt upright can be uncomfortable (and inefficient) for many people.
Crouched forward to a greater degree than most urban bikes. Inefficiency is from poor aerodynamics
rather than a power supply perspective, and it really isn't an issue on a typical urban commute up
to, say, around 5 miles (I use the Brompton rather than the 'bent for that sort of distance, even if
it's windy, when parking and stowage at the other end are going to be issues and I don't need the
extra load carrying).
Quoted message said:Wide tyres are great for casual and town use as they provide a comfortable ride and soak-up the
potholes.
Wide tyres with mud knobbles (yes, you can change them, but AFAICT most people never do so that's a
moot point on a typical UK cheap MTB) on are utterly, utterly [censored] for town use because they
generate noise and vibration to reduce comfort as well as considerable extra friction that reduces
speed and probably doesn't exactly help cornering. I speak from the experience of riding my MTB on
roads (I go on roads to get to the off-road) with its wide, knobbly tyres.
Quoted message said:Not if you tuck trousers into socks! Chain gaurds are a big nuisance when they get bent or knocked
out of position, and make maintenance more awkward.
There's chain guards and chain guards. The Streetmachine needs a great deal less chain
maintenance than it's predecessor in part because the chain runs most of its length in teflon
tubes where bending and being knocked is effectively a non-issue. The Brompton doesn't have
anything nearly as elaborate as a full case, but still doesn't get oil on my trousers. I don't
wear socks most of the time.
Quoted message said:"City bikes" with hub gears may be better for some people who don't like derailleurs or doing
/any/ maintenance, riding in flat areas, perhaps with long skirts. ...That's not really the
majority of the population, is it?
There seems to be a misconception about what you can get from hub gearing. The 3 speed Sachs on my
Brompton is quite enough gears to get me round Dundee, and if you're not familiar let me assure you
it doesn't do "flat" around here. And the Sachs 3 is hardly the last word in big gear ranges (though
we'll ignore the Rohloff here as it costs more than most bikes).
Derailleurs are generally unnecessary for short hacks and as well as being exposed to salt and grit
they increase chain wear.
Derailleurs are good on urban bikes where you're using one bike for everything (why my old
derailleur tourer got used for commutes and shopping), there are unusually large hills and/or cargo
requirements (an 8 Freight can take a 100 Kg load, wouldn't fancy that without grannies!). But the
main reason people get them, I'm quite sure, is because they have a less stuffy image and that's the
market (both feed into the other). I wouldn't have bought a hub gear bike as recently as about 3 or
4 years ago. I wouldn't have bought a bell, kickstand or dynamo either. Now I know I was more
worried about image and form than function, and frankly making life harder for myself.
Pete.
--
Peter Clinch University of Dundee Tel 44 1382 660111 ext. 33637 Medical Physics, Ninewells Hospital
Fax 44 1382 640177 Dundee DD1 9SY Scotland UK net [email hidden]
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