Inspired by the legendary Oregon Outback and named after the first climb of that epic 360-mile gravel ride/race, the Switchback Hill is the world’s lightest, fastest and most comfortable ultra-wide 650B tire.

On the Oregon Outback route, the gravel is quite loose in places, and the extra flotation of the Switchback Hills gives you more speed and security when the going gets really rough. 30% of the Oregon Outback is on pavement, so we designed this tire to roll as fast and grip as well as a good racing tire. The tread has enough thickness in the center to last many miles, but it’s thin and supple on the shoulders where it doesn’t wear. With this tire, you truly have the best of both worlds.

In their 2024 Buyer’s Guide, road.cc rated the Switchback Hill the “Best 650B road bike tyre.” They wrote: “At just 412g per tyre; the extralight casing is super supple and soaks up tarmac miles with no obvious penalty over something much, much narrower. Just be prepared for a few funny looks from your thin-tyre counterparts as you keep up just fine.”

The Endurance casing is reinforced for extra sidewall protection and puncture resistance, while retaining the speed and comfort for which Rene Herse tires are famous.


Clincher, folding bead
Tubeless-compatible
ISO size: 48 - 584 mm
Recommended rim: 17-30 mm (inner width), hookless or with hooks
Maximum pressure with tubes: 55 psi (3.8 bar)
Maximum recommended pressure – tubeless: 55 psi (3.8 bar)
Actual width on 20 mm rim (internal): approx. 49 mm
Actual width on 23 mm rim (internal): approx. 50 mm
Extralight casing: +1 mm width
Tubeless: +0.5 mm width
Made in Japan

Endurance casing

The same ultra-fine threads as our Extralight casing, but in a denser, stronger weave
Protective belt under sidewalls and tread
Ideal for rough gravel and tough conditions
Dark tan sidewalls
520 g