Is this to tight or can I go tighter?
Currently on 700×30 toes and this is a 3m hex and doesn’t move so it’s tight
Can I go for 32 or would that be to close? Max tire clearance is 34 on the website and these are the reserve 52 63 rims
by Zealousideal_Rush_85
13 Comments
Yeah it’s too tight, you’ll have to send it to me to scrap
Take a look at the chainstay for clearance. The reserves have a fairly wide internal width and are likely causing those 30s to inflate wider.
It’s less about if a tire will fit but what happens when there’s some debris.
Unless you ride in extremely clean conditions, you can always expect something to find it’s way in at some point.
It’s very aero
Crapvelo
.035” gap
I’d run it with 3mm gap but less than that I wouldn’t.
If you ride in dirty conditions and/or don’t clean your bike frequently you will likely wear a hole through your seattube (bad) or possibly chainstay (terrible). Ask me how i know 😞 keep it clean, and it should be fine!
Website says up to 34c but not with that rim and tyre combo I’m afraid. For track riding you can run it but I wouldn’t ride that clearance outdoors with such a nice frame. Just run 28’s is my recommendation
Can’t understand why putting wider tires in a race machine.
This bike isn’t gravel. Stick with what the frame was designed for.
Check the bike specs
If you think your current fit is tight, then 32 is going to be tighter.
Cervelo states that it will take 34mm tires (measured). My 30c Vittoria Corsa Pro measure 32.8mm wide on the front and 31.9mm wide on the rear with the Reserve 52/63 rims.
I would probably only be comfortable with a 32 on the front, as there is more clearance.
We need like a tire/wheel/WAM spreadsheet. I’m guessing your 30c tire measures 33.5mm. Most likely, a 700x32c tire will blow up to at least 34mm. I recall that a 30c GP5K S measures 32.5mm in the rear. For me on a 2026 S5, a 5mm wrench is snug at the seat tube and stays. A 4mm wrench is loose.
On new Reserve wheels 57|64 they recommend minimum size 29. I wouldn’t use a 32c tire. On a different bike, also with minimum clearance, debris quickly caused paint chips in the bottom bracket area.