SRAM’s new Rail 40 wheels are apparently designed to be wheels ‘designed specifically for the modern mountain biker’, which is handy, as it’s to them they’ll be aimed. They’re built for aggressive All-Mountain descents with the ‘strength and stiffness you need’ alongside the critical ‘lightness to climb quickly back to the top’.
They’ve apparently got a WIDE ANGLE™ rim design to provide a ‘new benchmark in stiffness’, the profile mentioned is 23mm – we’ve approached SRAM to determine whether this is the internal or external width.
You can get them in 27.5 and 29er sizes, and in pretty much every common flavour of dropout design or axle width, from QR all the way to BOOST 148. It’s got a whole pile of technologies – XD driver tech (for SRAM cassettes), BOOST (new hub width, WIDE ANGLE (rim profile) and TAPER CORE (rim variable thickness design) as well as the usual 4 pawl ratchet (Double Time), matched bearings (speedball) and single spoke length (Solo Spoke) features.
The wheels will come in from £258 for a front one and from £299 for the rear.
More information is available from SRAM