Continental go 5k sizing

[oldmill]

How true to size are these tires in clinchers? I’d like to go bigger than 23s but I don’t have a lot of leeway if the 25s run big. Thnx

[JasonF]

They run pretty true to size: my rims have a 20mm internal width and GP5K 28's measure just @ 29mm after being mounted for a couple rides.

[oldmill]

Ok - thanks much

[skijoring]

Older style rims (14-15 MM ) inner width, they run 1-2 MM smaller; e.g. a 32C measures as 30.

Newer rims they are spot on, or maybe 1 MM wider. But less height than the old 4000SII model.

Nice riding tyres.

[AngryScientist]

Are you in NJ?

If you are close, you're welcome to come by and test fit a few of my wheels with 25c contis in your frame to see if they fit.

PM me if so. i'm in Nutley.

[yinzerniner]

How true to size are these tires in clinchers? I’d like to go bigger than 23s but I don’t have a lot of leeway if the 25s run big. Thnx

Yeah really depends on the inner diameter of the rims you’re using. I think conti said they’re supposed to fit true to size on 19mm ID, and 1-2mm larger for 21mm ID.

I have a set of 28mm and on a 20mm ID rim they were 29mm, so that seems to match up with the specs. If you’re using the GP5k on 17mm ID rims I can’t see them being any larger than stated width.

[fa63]

The 25c version measures 27.6mm on my HED Belgium+ rims (21 mm inner width).

[robt57]

The 25c version measures 27.6mm on my HED Belgium+ rims (21 mm inner width).


My 4000s do that in a 25, the 25mm 5000s are smaller.

So are you saying your 5ks are 27.6, or is it 4ks???

[fa63]

GP5000. I measured it with calipers right before I posted.

[GregL]

GP5000 (nominal size 700x25) measured 27.5mm on Kinlin XR-31T rims (19mm internal width) at 85 PSI. For comparison, GP4000S II (700x23) measured 27.1 on the same rims at 88 PSI. The GP5000 was a few millimeters taller, making the fit under the brake bridge marginal on one of my bikes.

Greg

[oldmill]

Thanks much for the replies here. Very helpful. The lesson here is: next time, buy a bike with more clearance

[robt57]

I should check my rims the 25mm 5ks are on. Maybe they are 17-18c and not 19-20c I apparently mis-remembered...

23mm outer width...

[pdmtong]

Buy Vittoria G+ open corsa !