Originally Posted by
RickinFl
That's mostly the difference in the amount of rubber you're seeing- 28's are heavier than 25's. I didn't look far, but the difference between a folding 700x23 Gatorskin and a non-folder of the same size and type is 47 grams. Not really very much of a difference when distributed across the probably 30-40 lbs of most tandems.
My guess is that you'll see something close to what I found for the 23's if you search out the specs for the 25.
Rick
From Conti site:
UltraGatorskin 700x28 320g --------------------My original tires
Grand Prix 4000 700x25 215g ------------------New tires
UltraGatorskin 700x25 300g
UltraGatorskin folding 700x25 250g
UltraGatorskin 700x23 280g
UltraGatorskin folding 700x23 230g
No folding 28 Gatorskin to compare but these would be close:
GP 4 Season 700x28 250g
GP 4 Season 700x25 230g
Personally enough of a weight difference for me to stick with folding tires.
