From Skyler from Mica - "Rat Tail is not a pannier rack - this minimalist rack is designed to support a 6-9" (15-23cm) diameter drybag and serve as an alternative to a bikepacking seat pack". We have found that the Rat Tail works amazing with our Micro and Mini Panniers and have personally been using them for over a year. We also had our friend Ethan Haney finish the tour divide in 19 days this year with a Rat Tail and our Mini Panniers. Weighing in at 410g, including all mounting hardware, it is lighter than many seat packs of the same size - even after adding a drybag and straps - while offering more stability, full use of a dropper post, and a place to install bottle cages, cargo cages, or other accessories. This award winning rack was described by Bikepacking.com as "a brilliant option to turn any hardtail [or rigid bike] into a light, bikepacking-ready steed, whether it has rack mounts or not." Rat Tail is designed to work on nearly any bike, without needing threaded rack mounts on your frame. It mounts to the seat post or seat tube with an included clamp, and the vertical struts mount to the seat stays with either heavy duty zip-ties or small hose clamps. On larger road frames, where the seat post might be a long ways above the rear tire, you might be interested in the option of using a Seat Stay Bridge Adapter to mount from a fender or brake mount on the seat stay bridge. Included: Rack with 3-pack mounts on vertical stays. 35mm seat post/seat tube clamp with shims for 27.2mm, 30.9mm, and 31.6mm. The 35mm clamp size fits directly onto many frames, below the seat post (as pictured). Contact for other sizes. Seat stay mounting blocks. 10mm bolts for the bottle/accessory bosses Heavy duty zip ties for mounting seat stay blocks. (5/16" wide hose clamps will also work in the place of zip ties, and can be found at your local hardware store.) Need to know: Top platform length: 17" / 425mm Max tire size: 3.1" / 80mm Weight: 410g (functional weight, includes mounting hardware) Weight capacity: 10kg / 22lbs (2kg per 3-pack cargo mount) Colour: matte black Material: 4130 chromoly steel tubing, 6061 T6 aluminum seat post clamp, stainless clamps, nylon seat stay mounting blocks, stainless screws throughout. Check with frame manufacturer before using on carbon or ultralight race frames One size fits most. Not compatible with full-suspension bikes. INSTALLATION INSTRUCTIONS