29 x 25mm internal: 2.3 carcass, 2.2 tread for both 2.4 MK and XK tyres
The 2.2’s are not a tyre I see any use for as you cant run low pressures like in the 2.4 versions.
even the 2.2 TK/RQ I think is an unnecessary size with the 2.4mk/XK being a great alternative.
Neither 2.2 MK or XK are a high volume tyre. More of an old school XC race tyre size liek my first panaracers 😉
The 27.5 TK fits into a 26″ fork, the 2.4 TK does not, so there’s a significant volume difference (carcass height) between 2.2 and 2.4.
Incidentally, for 2018 the 2.2 MK is discontinued and the new MK is 2.3. The refreshed CrossK goes to 2.3 and 2.2, I suppose to address their sizing mismatch.
I’d be surprised if a SG rock razor rolls faster than a XK and the XK will last much longer too! We have guests wearing out SG rock razors in a week here. Speedgrip supposedly gives much better rolling/wear.
Were you looking for rear only or running these Rock Razors as a fr/rr pair?
