Quote:
Originally Posted by oldpotatoe
True but the OP is going to use a 25mm tube in a 28mm tire..not 'highly stretched'. 25mm tube will be fine..
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i'd agree with this cause of personal experience...
years ago I used vittoria tires, 23mm corsa opens or something with latex tubes, i think they were michelin and maybe 19-23...when I'd used up the tire and tried to use the tube again they were always too big, stretched out, near impossible to fit back into a 23mm tire...
just bought some conti grand prix 5000s, 25mm, and ordered michelin 22-23 size air comp latex...actually, they look crazy wide in the box compared to butyl tubes of the same size...i don't think i'd hesitate to put them in 28mm tires...just my opinion...i'm no expert, no mechanic...i think i'm gonna start em out very low pressure, and work up a bit...i usually ride at 6.5 to 7 bars up front...just start at 6.5, maybe 7 in the rear...see how it feels...
the butyl conti's have 25-32 stamped on the tubes themselves...
the latex michelin's are what is marked on the box...i wouldn't hesitate to use 'em in my 28mm tires...
200602.tubes-0004418 by
Morris, on Flickr
200602.tubeboxes-0004419 by
Morris, on Flickr