The Continental Gran Prix 4000s 700x23 tyres are on Sale for $40.71 each.

Buy 2 and use code bicycling10 to get them for $73.28 shipped.


I just picked up a pair! :woot:

https://www.probikekit.com/us/contine...ires-23mm.html



Everywhere else its $160 or more for a pair..

That's good price.
Thanks for sharing the info !

but 25mm are still priced high! and 25 is where its at!!!

YUUUUUUUP

use coupon code bicycling10 for 10% off

I buy my 25mm GP4000S from Planet Cyclery's eBay store for $99.95 per pair (free shipping)- https://www.ebay.com/itm/300747149029...84.m1439.l2649

That's a great deal though for the 23mm from ProBikeIt.

I have used 23 and 25MM and I don't really notice much of a difference. Maybe if I tried them back to back I could but I switched from 23s to 25s because the 23s go on sale and are more easily found.

Order from Ribble. 25s are $35.19 plus shipping. Shipping was $7 for two. So you would have saves $23!

Thanks for the tip!

The difference is a couple watts per tire. Of course you couldn't feel the difference.

The current issue of Velonews does a test of tubulars. While they aren't clinchers, the points cover the same which mean people can't generalize about tires, sizes, and air pressure. A lot boils down to how specific manufactures construct their tires/casings and the actual conditions. Some tires are faster in wider sizes, a few aren't. It's all about maintaining contact area, especially when the tire hits road imperfections. Some tires are more supple, which makes for a smoother ride but adds to the rolling resistance. Adding too much air pressure generally increases rolling resistance, but not necessarily. VN tests showed on smooth roads where the tire doesn't bounce, higher air pressure is faster.

So saying 25's are faster than 23s for all tires isn't always true. The same with higher air pressure.

I ordered the 23s because they seem to be more common. I'm also pretty light (142 lbs) so I can run 23s at a lower pressure than many other people. I run my current tires (Bontrager R3, came with the bike) at 110/105 on recommendation of LBS but I've been told I can go lower.

thanks for the heads up, just ordered a set.

Forgot to mention the 23s are cheaper from Ribble than probikekit as well. They are $32 each before shipping.

In case anyone is wondering about shipping from pbk. I ordered 4 using this deal on 10/9 ($36.64 each inc. shipping). Shipped on 10/10, arrived in Boston today. Color me happy.