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adapt chainstays to take a wider wheel?

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LF

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May 22, 2012, 10:15:55 PM5/22/12
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Could, would a frame builder adapt the chainstays so that I could fit a wider tire and fender. Hoping for a 35mm tire and fender on a mid-1980s steel Specialized Sequoia.
thanks,
Larry

datakoll

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May 22, 2012, 10:41:33 PM5/22/12
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On Tuesday, May 22, 2012 8:15:55 PM UTC-6, LF wrote:
> Could, would a frame builder adapt the chainstays so that I could fit a wider tire and fender. Hoping for a 35mm tire and fender on a mid-1980s steel Specialized Sequoia.
> thanks,nt tire
> Larry

measure in mm between chainstays at the outside circumference current tire at the seatpost side. this distance minus hmmmm 3mm each side for clearance minus a
measurement for the extra diameter of the future tire gives what the frame can bear, repeating the clearance measurement at the future hypothetical tire circumference.

Sir Ridesalot

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May 23, 2012, 12:45:55 PM5/23/12
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Don't forget that a wider tire is also higher. Therefore you need to
check the length or space between the bigger tire and the chainstay
bridge if there is one and also the space between the tire and the
brake bridge.

I've had 1980's era steel frames, a Fiori Modena being one of them,
where the height of a 32 mm tire would cause it to almost rub the
chainstay and brake bridges. On some old steel frames the tire would
rub the chainstay bridge.

That being said, it is relatively easy to cold-set (spread the
chainstays) and Sheldon Brown's site has an article on how to do it.
Any *COMPETENT* bike shop should be able to do it for you.

Will you have enough height between the bigger tire and the brake
bridge to put a fender so that it doesn't rub the top of the tire?

Cheers

AMuzi

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May 24, 2012, 1:57:20 AM5/24/12
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Probably not economically. That exact problem was the
impetus for Grant Peterson's 650B fixation. 650B wheels are
is another path your might consider.

--
Andrew Muzi
<www.yellowjersey.org/>
Open every day since 1 April, 1971

LF

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May 24, 2012, 7:50:55 AM5/24/12
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Andrew,
That makes sense. Probably the easiest and cheapest route to fat tire happiness.
Best,
Larry

thirty-six

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May 24, 2012, 1:14:51 PM5/24/12
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Also 24mm tub from Challenge or Vittoria. Keep your eye's open as
larger road tub's may make it to markrt before next year.
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