Roscoe F/S S 27.5 Lava

Roscoe Frameset is a build-your-own-adventure hardtail frame that's up to get down. Its Alpha Platinum Aluminum chassis delivers progressive hardtail trail geometry that's confident anywhere from fast and loose trails to dirt jump lines, and is designed to be paired with a 150mm fork. Build it however you dream, then chase down your rowdiest pursuits.

Ready to get rowdy

With 150mm front travel, trail-smashing 29-inch wheels, and dialed-for-dirt frame features, Roscoe is ready to get rowdy on your favorite rides.

Rock Solid

The bolt on downtube guard will stay put even after ripping though a chucky trail, keeping your bike quiet and protected.

Integrated storage

The frame bag is made from a recycled ripstop polyester with an eco friendly DWR coating on the outside that is water resistant, with plenty of room to stash everything from snacks to safety supplies.

Progressive trail geometry

A long reach, slack head angle, steep seat angle, and short chain stays combine for a ride that's confidence inspiring, yet still nimble and fun.

A better way to produce aluminum

Starting in 2024, we began removing high-emission aluminum from our manufacturing and replacing it with low-emission aluminum made with renewable energy. By October 2025, nearly every alloy bike we make - this one included - had made the switch, driving a major drop in our footprint.

Frame	Alpha Platinum Aluminum, tapered head tube, ZS headset, internal derailleur & dropper post routing, ISCG 05, threaded BB, UDH, 148x12mm thru axle
Skewer Rear	Bontrager Switch thru axle, removable lever
Seat Collar	Bolt-on, 36.4mm
Headset	FSA Orbit, sealed cartridge bearing, 1-1/8'' top, 1.5'' bottom, 1.5 crown

Geometry Chart

B B Drop	4.5
B B Height	31.1
Chainstay Length	42.5
Eff Seat Tube Angle	75.0°
Eff Top Tube	57.5
Frame Reach	41.5
Frame Size Letter	S
Frame Size Number	15.5"
Frame Stack	60.4
Head Angle	65.0°
Head Tube Length	9
Offset	3.7
Seat Tube	33
Seat Tube Angle	73.1°
Standover	71.4
Trail	12.5
Wheelbase	113.9
Wheel Size	27.5"