Revelate Designs Tangle Frame Bag - Large Best Fits: 17 - 21" Hardtail mountain bikes and cross bikes Top Length 19.5", Height 4.5" Designed to fit a variety of bike frames, these bags can be used for everyday riding, commuting, and adventuring Adjustable webbing attachments with low profile cam lock buckles for broad array of bike fits Dimension Polyant Xpac 400 Denier Fabric