With the Topeak DeFender XC1 & XC11 29er mudguard set will fit MTB tyres up to 29" x 2.5". You get excellent coverage against mud and spray.  DeFender XC1 Front Mudguard The DeFender XC1 is lightweight, durable and moto inspired with a two-piece design. This fender attaches to your suspension fork lowers so a close fit to the tyre – so you get improved mud/spray protection.  A precision clamp secures the front mudguard to the fork’s lower legs and a special safety feature allows it to disengage if a large obstruction enters the wheel. DeFender XC11 Rear Mudguard Also lightweight the XC11 is a removable rear MTB mudguard. Multiple pivots offer easy angle adjustment  while the quick release clamp adjusts to fit ø25.4 - ø34.9mm seatposts. Durable high impact plastic is co-molded to a flexible trailing edge for resistance to impacts while the highly polished underside of the fenders prevents dirt build up in extreme muddy conditions. Fits MTB 29” tires up to 29” x 2.5”. Key Features Attachment (Front)  Two Pieces QR Bolt-on Fork Attachment Fits ø36 - ø48.5 mm Fork Legs Attachment (Rear)  QR Slip Joint Clamp Fits ø25.4 - ø34.9 mm seatposts Adjustable  Multiple Angles Adjustable (XC11) Material  Two Tone Injected High Impact Resistant Plastic Added Features Automatic Obstruction Disengagement (XC1) Highly Polished Underside Size (L x W x H)  33 x 24 x 19 cm 13” x 9.4” x 7.5” - XC1 FF (26"-29") 23 x 40 x 29 cm 9.1” x 15.7” x 11.4” - XC1 FR (26"-29") 67 x 10.2 x 7.5 cm 26.4" x 4" x 3"- XC11 (29") Weight  350 g / 12.32 oz - XC1 (26"-29") 220 g / 7.74 oz - XC11 (29")