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700x25 question....(5 posts)

700x25 question....cydswipe
Jun 16, 2003 5:50 PM
I'm using the Conti GP 3000's that came stock on my bike. It's getting time to replace them. I'm noticing that 700x25 isn't a real popular size in catalogs like Performance or Nashbar. Why is this? What differences would I notice if I switched to, let's say, 700x23?
what I noticed...niteschaos
Jun 16, 2003 5:59 PM
when going from 23 to 25 in the Conti Sport 1000 ($15 training tire, so take with grain of salt as needed) was that the transition to turns felt less abrupt and that the ride smoothed out a good bit. The 25 though let me run 15psi less per tire so they smoothed out the ride a good bit. I'm running Tufo Special S33s at 120psi and they feel as smooth as my Sport1000's did at 100psi so I don't know if you'll notice a difference in Conti's top tire.
Not a big difference w/same brand, but all negative to mecory
Jun 16, 2003 8:52 PM
It's worth a try (I've ridden everything from 700x19 to 700x41 in the last several years), but for general riding, I'm more comfortable going bigger instead of smaller. The ride is cushier (because you can run lower pressure), and the bike corners better, especially on rough surfaces, because it doesn't dance around. I weigh about 230, which is a factor (I have to run skinny tires at 120+) but I don't even think about anything smaller than 32 anymore. I'd reconsider if I were racing, but I'm just riding around....
Jun 17, 2003 9:16 AM
I use 700x25 on my good bike; the largest tires my commuter will comfortably fit (700x32 rear, 700x28 front) and whatever's left around on my night/rain bike. Going from 23 to 25 I notice the same positive differences you do plus improved durability and very little difference in speed. I'd be very enthused to try a high performance tire in 700x28. Know of any?
Avocet or Roly PolyRay Sachs
Jun 17, 2003 9:30 AM
They're both pretty wonderful bigger tires. The Roly Poly is a bit lighter, although they're both close to 300 grams so we're not talking about real lightweights in any regard. Both are plush, corner great, and don't fee any slower than skinny tire except possibly on really tough climbs.