Fantastic product. This is the second Tetrarack M1 I've purchased, having previously enjoyed using other quick track racks and adapters. The specification says that it can be used up to 2.8" tyres, but I've successfully fitted it to my 4" fat tyre E-Bike...There is plenty of clearance for the wheel, but definitely wouldn't fit it to anything wider. Hopefully Topeak will think about extending their range to accommodate even larger width front tyres with an M1 XL. I use my racks with the MTX range of bags with the drop down side panniers, but there are a huge range of other accessories available. Lessons I learned with the first rack is to keep the adjustment screws lubricated and not to overtighten the strap tensioners if you want to use it on several bikes or transfer to a different bike. I think the Tetrarack enhances and complements the look of my bike