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Old 06-24-07, 06:25 PM   #1
supton
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Gum wall tires

I recall coming across a link about these, but can't find it again. When do these need replacing? I think the gum walls are cracking, but it's hard to tell if it's the tube pushing out at those cracks or just just the gum material swelling out a bit. The tread looks ok, again cracking in that area; but it seems to be holding air.

Also: I think these tubes are 20 years old. They held air over night, at 50psi. Prudent to replace, or just wait for a hole?
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Old 06-24-07, 06:37 PM   #2
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Personally I would replace the tubes and the tires. If you want to be thrifty you could hold on to the tubes for emergency repairs...you know, to carry as a second extra or something.

I search Amazon.com for gumwalls ( or my LBS but yours might not carry them). There's a brand named Kenda that is $10 or less.
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Old 06-24-07, 06:55 PM   #3
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My LBS didn't have them in stock--I guess they sold their last pair just before I came in. Said to come back in a week, like when I pick up my other bike. I'm not hung up on it being gum wall or regular rubber; I just want reasonably smooth, for good road riding. Problem is, I guess 27x1 1/4 is an old size, so selection isn't great.
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Old 06-24-07, 07:46 PM   #4
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Try Nashbar.com

http://www.nashbar.com/results.cfm?c...ory%3A%20Tires



http://www.performancebike.com/
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Old 06-24-07, 09:13 PM   #5
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I use the Performance GT II, 27 X1 1/8 and 27 x 1 1/4 on older road bikes I acquire, some of which I resell. I've been satisfied with them, especially when I match the 27X 1 1/8 with alloy hooked bead rims. They're inexpensive (actually cost less than the Kendas when on sale) and have a pressure rating of 105 PSI and provide a nice ride. They have a Kevlar version that is available for $10 on sale and comes in the two sizes mentioned and a 27 X 1" that has a pressure rating of 110 or 115 PSI. I just purchased the Kevlar version for an old Raleigh Record I use as a winter bike.
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Old 06-25-07, 08:05 AM   #6
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the Kevlar tires are on sale right now!

http://www.performancebike.com/shop/...tegory_ID=5420

I like those, also, because of the narrow width. I have found Kenda on sale for as low as $5.99 but only in 27X1 1/4.
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Old 06-25-07, 08:45 AM   #7
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Sheldon Brown has a good selection in 27 inch if you are seeking good quality. Also a great read...

http://sheldonbrown.com/harris/tires/630.html
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