Lemond Zurich conversion

[Marcin Skiba]

 

Hi,

A while ago I enquired about the possibility to convert Lemond 853 frame to 650b. Well, it took me a while but it;s now done. The first impressions are very favourable, the ride is very nice. The clearances are a little tight with GB Lierre tyres, around 3mm to chainstay and about 2mm to the inside of fork leg. The bike as pictured weighs 9.5 kg (or 21lbs for luddites) which I think is OK given that I didn't pay any attention to parts weight. Anyway, some pictures:


Thanks,
Marcin

[Greg Walton]

Nice.  What is the bottom bracket height with this setup?

 

Greg

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[Steve Chan]

 

   Cool! Very timely - the BQ article on a 650B race bike, and the recent thread on the Boblist about a cheap, fat-ish tire racer had me wondering how this project came out. Can you take some photos of the chainstays? I'm curious if they could be dented to support the Pari-Motos.

   Steve

On Mon, Jul 2, 2012 at 11:38 AM, Marcin Skiba <marcin...@gmail.com> wrote:

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[Marcin Skiba]

Thanks,

The bottom bracket is on the low side, around 26cm, but this has not been an issue so far.
Aren't the Pari Motos the same size as GB Lierres? My tyres measure exactly 38mm and there is still 3mm on each side to the chainstay. I suppose you could dent the chainstays but I would be wary with 853 tubes.

Marcin

[Steve Palincsar]

On Mon, 2012-07-02 at 12:00 -0700, Marcin Skiba wrote:
> Thanks,
>
> The bottom bracket is on the low side, around 26cm, but this has not
> been an issue so far.
> Aren't the Pari Motos the same size as GB Lierres? My tyres measure
> exactly 38mm and there is still 3mm on each side to the chainstay. I
> suppose you could dent the chainstays but I would be wary with 853
> tubes.

Perhaps this frame would be better off used with either the Grand Bois
Cypres 32mm or the Confrerie de 650B tire, which is a little narrower
than 32.

[Marcin Skiba]

Perhaps, I intend to try someday. Do you think 3mm clearance is not enough? I've seen bikes with less clearance ridden without problems.

Marcin

[Ed Braley]

That bike looks great!

 

If your wheels are tight and true, and the tires are mounted evenly, then 3mm is adequate. Some of the new hi-tech race bikes don't have much more clearance than that, and they're all running 23mm 700C tires on low spoke wheels.

 

Hot rod 650B road bikes are the industry's best kept secret.... ;-)

 

Ed.

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[Nick Payne]

I rode a Litespeed converted to 650b for a couple of years, and with Michelin Megamium tyres fitted there was considerably less than 3mm clearance to the chainstays, but I had no problems with the minimal clearance. It also had a pretty low BB - 76mm drop - but after scraping a pedal a couple of times when it was first converted, I soon learned not to pedal through corners at any speed, and that wasn't a problem either.

Photo of the converted bike here: http://www.users.on.net/~njpayne/bikestuff/litespeed_650b.jpg

Nick

On 03/07/12 09:31, Ed Braley wrote:

That bike looks great!

ďż˝

If your wheels are tight and true, and the tires are mounted evenly, then 3mm is adequate. Some of the new hi-tech race bikes don't have much more clearance than that, and they're all running�23mm 700C tires on low spoke wheels.

ďż˝

Hot rod 650B road�bikes are the industry's best kept secret.... ;-)

ďż˝

Ed.

----- Original Message -----

From: Marcin Skiba

To: 65...@googlegroups.com

Cc: Marcin Skiba

Sent: Monday, July 02, 2012 3:05 PM

Subject: Re: [650B] Lemond Zurich conversion

Perhaps, I intend to try someday. Do you think 3mm clearance is not enough? I've seen bikes with less clearance ridden without problems.

Marcin

W dniu poniedzia�ek, 2 lipca 2012 20:03:01 UTC+1 u�ytkownik Steve Palincsar napisa�:

Perhaps this frame would be better off used with either the Grand Bois
Cypres 32mm or the Confrerie de 650B tire, which is a little narrower
than 32.

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