Schwalbe Big Apple HS338 28x2.35 Kevlar Guard Performance Series Sidewall lists german measurement, 28x2.35 28 = 700c Kevlar-MB belt puncture protection using a combination of natural rubber and Kevlar fibers Built-in "suspension" which absorbs over 36% of vibrations at the handlebar Kevlar-MB belt puncture protection using a combination of natural rubber and Kevlar fibers