• Wireless control unit
    In- deflate tyre pressure on the fly wirelessly
  • Ideal for MTB XC
  • Low power consumption
    Only low human power required when switched on
See all specs
XC-28 for mtb wheels
  • Specifications

    GRAVAA XC-28 DOMINATE THE MTB TRAILS
    Gravaa XC-28 wheelset
    GRAVAA GX-30 UNLEASH YOUR GRAVEL POTENTIAL
    GRAVAA GX-30 Wheelset
    Ideal for MTB XC riding Bike touring, Gravel riding
    Wheel size 29″(622) 29″(622)
    Brake type Disc brake only Disc brake only
    Weight 1990 g (boost) 1970 g (non-boost)
    Rim type Carbon, TLR Carbon, TLR
    Rim materials Carbon Carbon
    Rim height 28 mm 30 mm
    Rim inner width 25 mm, 30 mm, I will specify this later 25 mm
    Tyre types Clincher – Tubeless ready Clincher – Tubeless ready
    Tubeless ready Yes* Yes*
    Tubular version
    Hub type Boost (110 mm front, 148 mm rear) Boost (110 mm front, 148 mm rear), Non-boost (100 mm front, 142 mm rear)
    Max. system weight 110 kg (rider + bike) 110 kg (rider + bike)
    ANT+
    Bluetooth
    Disc brake rotor front 140 mm disc, 160 mm disc, 180 mm disc, I will specify this later 140 mm disc, 160 mm disc, 180 mm disc, I will specify this later
    Disc brake rotor rear 140mm disc, 160mm disc, 180 mm disc, I will specify this later 140mm disc, 160mm disc, 180 mm disc, I will specify this later
    Number of spokes 28 28
    Spoke offset 2.5 mm 2.5 mm
    Spoke type DT Swiss Competition Race (1.6 mm) DT Swiss Competition Race (1.6 mm)
    Spoke nipple type DT Swiss Pro Lock 2.0 mm (aluminum) DT Swiss Pro Lock 2.0 mm (aluminum)
    Freehub system 6 – pawl freehub system, for fast engagement 6 – pawl freehub system, for fast engagement
    Freehub body Campagnolo Ekar 13 speed, M-body, Shimano Microspline 12 speed, SRAM XD/XDR, I will specify this later Campagnolo Ekar 13 speed, M-body, Shimano Microspline 12 speed, SRAM XD/XDR, I will specify this later
    GRAVAA XC-28 DOMINATE THE MTB TRAILS
    Gravaa XC-28 wheelset
    GRAVAA GX-30 UNLEASH YOUR GRAVEL POTENTIAL
    GRAVAA GX-30 Wheelset
    Tyre used for specs 29x2.25" tyre (57-622) 29x1.50" tyre (40-622)
    Inflation on the fly While riding While riding
    Deflation on the fly During standstill, While riding During standstill, While riding
    Tyre pressure operating range 0.5 - 6.0 bar 0.5 - 6.0 bar
    Average inflation rate 200-250 mbar/min at 25 km/h 400-450 mbar/min at 25 km/h
    Average deflation rate >100 mbar/s >200 mbar/s
    Inflation rate related to riding speed?
    Deflation rate related to riding speed?
    Average power consumption during inflation 2 - 4.5 W at 25 km/h, between 1 and 6 bar (per wheel) 2 - 4.5 W at 25 km/h, between 1 and 6 bar (per wheel)
    Average power consumption during deflation 0 W 0 W
Cross country Gravel bike Cyclocross
Cross country Gravel bike Cyclocross
Cross country Gravel bike Cyclocross

Gravaa enables you to control tyre pressure on the fly

After four years of developing, prototyping and testing we are about to hit the markets with our revolutionary wheelset. Want to be the first to own this wheelset? Check out our Kickstarter campaign.

Gravaa on Kickstarter
Verkuijl test

Jasper Verkuijl tested our wheels.

Check it on YouTube