it only works with QR end caps

They infuse air into the grip material

COMPATIBILITY - 1x11 X-ACTUATION

1pcs Seamless Microfiber Cover with coloured perforations

iXS Hack Evo Youth Knee Pads - Youth L - Black Exclusive it only works with QRThe iXS Hack Evo Youth Knee Pads are a terrific option for young riders starting to push their limits. The Hack series combines the characteristics from the Flow and Carve series, but in a trimmed down, cost effective manner. Being a 'soft protector' without a hardshell the Hack Evo Youth Knee Pads are lightweight and extremely comfortable. Who's this item for: Young or petite riders who are in need of knee protection that can still be pedalled in.