Bontrager R4 320 Tubular Road Tire

A super supple, hand-built, 320TPI tubular tire that excels in road and crit racing.

The pavement is calling
The R4 tubular’s race performance gives unparalleled road feel yet is extremely durable for a racing tubular, thanks to Hard-Case Lite protection. The Hard-Case Lite sub tread material protects against punctures in the peloton and up the hardest and sketchiest road climbs.

Product details
– Excellent for road and criterium racing
– Supple polyamide synthetic fiber reinforcement for added casing strength
– Hard-Case Lite protects against punctures with superior, lightweight, sub-tread material
– 38mm valve length with valve extenders available separately

Specifications
– TPI: 320 TPI
– Durometer: 60a
– Type: Tubular
– Max pressure: 190psi
– ETRTO: 23-622
– Puncture protection: Hard-Case Lite
– Studdable: No
– Weight: 280g (23) / 290g (25)