PLEASE ENSURE YOU USE THE HELITAPE PROVIDED WITH THE REAR MUDHUGGERS, INVISIFRAME AND ELECTRICAL TAPE ARE NOT SUFFICIENT TO PROTECT YOUR BIKES PAINT AND FRAME. 
SEE BELOW FOR HOW TO FIT VIDEO
Ideal for most 26" hardtail and full suspension frames, along with 27.5" hardtail frames. The Small Rear Mudhugger is all but mandatory for those sloppy rides. Keep the mud off your back, stay dry and spend more time on the bike!
For seat stay angles above 32 degrees (this is mostly hardtails, but some Full Suss) the Small Rear Mudhugger is the probably the best choice (although for 29er bikes we’d still consider the Medium Rear Hugger and maybe trim the length down to suit). Full suspension examples with high seat stay angles include Cube, Trek, Boardman, Scott and Rocky Mountain.