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Can I swap out these tires?

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Can I swap out these tires?

Old 11-22-13, 04:03 PM
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SlickCycles
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Can I swap out these tires?

Hi Forum,

I have a older 10 speed with 27 1 1/4 tires. The tires are well worn and I found a 27 1 3/8 pair of tires on CL. Is the small fraction difference major? Or is it an easy swap out and functional?
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Old 11-22-13, 04:17 PM
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They will probably fit on the rims, but whether the fork and stays have clearance for the wider tires we can't say. You should check before hand--look at the top of the fork, the seatstays and chainstays to see how much clearance you have.
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Old 11-22-13, 04:19 PM
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As long as there's plenty of clearance around the frame, fork, and brakes, the size shouldn't be a problem.

However there's two types of rims and tires with old 27" bikes. Some rims are hook beaded and require beaded tires. Modern clincher tires and rims have beads.



Other older rims don't have the little bumps. These require gumwall tires without beads.

You don't want to mismatch beaded/unbeaded tires and rims. Deflate your current tires and feel inside the rim. That way you'll know what kind of tires will fit.
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Old 11-22-13, 04:42 PM
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Just checked and it does feel like it has the bumps
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Old 11-22-13, 04:50 PM
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This is what it looks le with the current tires. Do you think there will be enough clearence?
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Old 11-22-13, 05:12 PM
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Originally Posted by JerrySTL View Post
As long as there's plenty of clearance around the frame, fork, and brakes, the size shouldn't be a problem.

However there's two types of rims and tires with old 27" bikes. Some rims are hook beaded and require beaded tires. Modern clincher tires and rims have beads.



Other older rims don't have the little bumps. These require gumwall tires without beads.

You don't want to mismatch beaded/unbeaded tires and rims.
??
I've had plenty of both straight-sided and hooked rims, but never any unbeaded tires (except for tubulars that used a completely different rim style). Some of the tires I used with straight-sided rims were gumwalls, but others were skinwall, white wall, or black wall. Most had wire beads but some were foldable tires with Kevlar beads.

To the OP - yes, there's plenty of clearance if you want to run 1 3/8" tires. But you shouldn't have much trouble finding 1 1/4" wide 27" tires either.
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Old 11-22-13, 07:00 PM
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A friend bought one for an old 70's road bike.
He put it on the rear. He has to deflate the tire to get it on/off. Not enough clearance to the chain stay bridge to move the wheel forward enough to disengage the dropouts.
YMMV.
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