New UCI rules will render some of the wheels used at this year’s Tour de France obsolete in the pro peloton in six months’ time.

From 1 January 2026, the maximum height of bicycle rims for mass start road events will be 65mm, with anything deeper banned. The measure was announced last month as part of a wave of regulation updates, all with the goal of improving safety in professional cycling.

You may like

The sticker on a bike wheel saying it is 67mm deep

Pogačar ran a 67mm rear wheel on stage one.

(Image credit: Tom Davidson)

The sticker on a bike wheel saying it is 60mm deep

Last year’s Tour winner went for a mismatched set-up, with a 60mm wheel at the front.

(Image credit: Tom Davidson)

Biniam Girmay's rear wheel at the Tour de France

Girmay’s wheels were mismatched, too.

(Image credit: Tom Davidson)

A close-up of the rim of a Newman wheel

Newman’s Streem S.66 is – you guessed it – 66mm deep.

(Image credit: Tom Davidson)

Bryan Coquard's 80mm rear wheel

Coquard’s rear wheel was the deepest on show.

(Image credit: Tom Davidson)

On the cusp

A Reserve wheel at the Tour de France

Visma-Lease a Bike are supplied by Reserve.

(Image credit: Tom Davidson)

A wheel that says the number 64 on it

No prizes for guessing this wheel’s depth.

(Image credit: Tom Davidson)

62mm deep wheel on Lidl-Trek bike

62mm will keep Jonathan Milan well within the rules.

(Image credit: Tom Davidson)