how low can you go?

Discuss light weight issues concerning mountain bikes & parts.

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polaris
Posts: 212
Joined: Fri Mar 28, 2003 5:14 pm
Location: Kent

by polaris

Recently started biking to work on my old Ti MTB as I don't get enough riding time in otherwise :cry: !

I need some help turning it into a lightweight street-bike? How narrow a slick tyre is a good idea on standard MTB rims?
.....but it still has to work!

by Weenie


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Knut
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Joined: Tue Jun 17, 2003 7:00 am
Location: Copenhagen, Denmark
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by Knut

How about the Conti Grand Prix which is a 26" version of the GP 3000 race tyre?

http://www.conti-online.com/generator/www/de/en/continental/bicycle/themes/tires/mtb/grand_prix_mtb/grand_prix_mtb_en.html

Works for me anyways... 8)

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Tippster
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Joined: Fri Dec 12, 2003 3:11 pm
Location: Frederica (Denmark)

by Tippster

I currently run Mavic X517 Rims with Panaracer Pasella 1.15 slicks. I'm thinking of upgrading to Conti Grand Prix 1.0's. My 1.15's are easily wider than the rims.

For the ultimate street bike. As I also commute to work 11 miles each way. I'm looking at builing 700c wheels with XT disk hubs to run a "proper" set of road tyres. This gets away from the issue of different brake set-ups 650c Vs 700c. The wheels are likely to cost be around £120.

From running the Panaracer Passellas on my 650c wheels you really do lose out on wheel + tyre circumference. Losing top end speed on the flat or downhill. Depends how serious you tkae your "commute".

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Bruiser
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Location: Sydney, Australia
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by Bruiser

Why would a smaller wheel make the bike slower?

I would have thought that the reduction in weight would have been more important.

I use 26*1.5 IRC Metros and find they fly.

Brian

limba
Posts: 956
Joined: Tue Dec 16, 2003 4:24 am

by limba

I'm getting the Conti. kevlar GP's soon.My store ordered the wire ones by mistake.You'll need really small tubes too.

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Smokebelch
Posts: 6
Joined: Mon Jan 19, 2004 9:57 pm

by Smokebelch

Bruiser

I believe the bike will be geared differently with larger circumference wheels making it faster for any given sprocket ratio

this will have the effect of being able to go faster due to the taller gears ... it will just need more effort :)

gentri
Posts: 63
Joined: Sat Jan 10, 2004 5:34 am
Location: Hawaii

by gentri

I run the cheaper Mavic x223 disk with Hutchinson Gold (26 x1.00) as my everyday wheelset. It is heavy but I train heavy and race light :wink:. I am planning to change this wheelset soon to a 700c with disc brakes, there is nothing wrong with too much wheelsets, right?

gentri
Posts: 63
Joined: Sat Jan 10, 2004 5:34 am
Location: Hawaii

by gentri

Bruiser wrote:Why would a smaller wheel make the bike slower?

I would have thought that the reduction in weight would have been more important.

I use 26*1.5 IRC Metros and find they fly.

Brian


Ohh boy, this would be a long and difficult topic for everyone. I do believe in 650c wheelsets. I actually run them on my tri bike.
There has been a lot of debate about this wheel size including, weight, aerodynamics, rotational weight, etc.
If you look at the data of the participants of 2003 Ironman, only 1/3 of them were using 650c. It could be because of the reason that 650c's are for shorter riders and most participants are taller that uses >52 frames.
I use a 52 frame and I am actually considering on selling my 650 frame and wheelset to purchase a 700c frame.
I guess we need a new thread for this . . . :D.

turb0
Posts: 113
Joined: Mon Sep 29, 2003 7:11 pm
Location: District of Columbia, US

by turb0

limba wrote:I'm getting the Conti. kevlar GP's soon.My store ordered the wire ones by mistake.You'll need really small tubes too.

Hi Limba,

Do you have any tips on tubes for the Conti Grand Prix 26 x 1's? I think I read somewhere to use 650c x 25 tubes or something along those lines.

Thanks!
-Robert

by Weenie


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