Don Pearce wrote:
On Fri, 07 Sep 2007 03:04:50 GMT, Patrick Turner
wrote:
Don Pearce wrote:
On Thu, 06 Sep 2007 16:27:41 -0700, Andre Jute
wrote:
Techieporn for you.
My Trek Navigator L700 "Smover"
Bicycle with Automatic Gearchange and Electronic Adaptive Suspension
delivered by Shimano Di2 Cyber Nexus Groupset
a photo essay by André Jute
http://members.lycos.co.uk/fiultra/B...%20Smover.html
My Trek is the 3400 - nice sensible road bike. Looks very similar to
that, but without the chain guard. Doesn't have all that dodgy brake
stuff, either. A reasonably heavy stop (say from 20mph in 5 seconds)
only needs to dissipate 3kJ at 600W, which is no problem at all to
dissipate in a pair of wheel rims.
d
There is a hill here about a km long, and about 7% slope,
and when descending it one must use the brakes all the way down for
safety reasons.
But at the bottom the rims of my road bike have not heated, not even on
a hot day.
I live up a hill exactly like that. I have never stopped at the bottom
to check the temperature of the rims, but the brakes are always still
stopping me without problems.
I have 3 bikes, all with reliable old steel frames and they all weigh
about 11kg, but I'm 78Kg now, and I have no trouble riding 90k across
town and back....
And during this winter I only rode the bike which has ONE gear, a 44t
front cog, 18t rear cog,
giving a 68inch gear. I was using 72" for awhile, but that proved too
hard into headwinds when riding
up some hills. I am rebuilding one bike with new fangled index gearing
which will allow me the luxury of riding up some very steep hills here
again.
Patrick Turner.
I know about bikes like that. When I was at school I was a rower.
Every time we arrived at the boathouse, we would have to build a bike
for our coach to ride along the towpath. There was a huge pile of
scrap wheels and frames round the back, and in ten minutes we could
mix and match something rideable out of it all.
Mine isn't as bad as that. I am moving to 32 spokes per wheel with
D-rims,
the old 36 spokers with flat section Mavics had done around 50,000km and
began to crack
with fatigue....
I have worn out so much bicycle gear after pedling an estimated
110,000km...
I cycled much further than i drove last year.
The steepest and worst arsole of a hill here is 3km long, averaging 8%,
and I don't ride it much,Fitz's Hill,
its 60km away just to get to it. But there's another ******* of a hill
seen at
http://www.images.act.gov.au/duslibrary/imagesact.nsf/view/3300800B698256C94A256D8D001C1077/$File/005119.JPG
This is about 2km, and 7%, and a bit of traffic uses the narrow winding
road to the top.
There is a nice view over my town though.
I used to do this on 48 x 18, but 15 years have passed, and maybe I need
a 48 x 23.
As you loose teeth as you age, you must put them onto the rear
cluster....
I hope to be fit enough to do Fitz'z Challenge in November,
http://www.pedalpower.org.au/events/...IntContId=1207
this time its the 20th ride, and I was in the first couple a long time
ago.
Last time I did it pretty fast at 40, and rode the whole lot alone, and
not many were in it, but if I can finish it at all at 60
I will be pleased. Many people ride this now, so I should have
company.
Patrick Turner.
d
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Pearce Consulting
http://www.pearce.uk.com