GMC Topkick Dual-Suspension Mountain Bike
- 21-speed mountain bike features a full-suspension, strong aluminum frame
- Floating beam suspension design is mated to a Zoom suspension fork with elastomer/spring technology
- Microshift push shifters and Shimano TZ-30GS derailleur
- Strong aluminum wheelset featuring V-shape rim profile and high-flange alloy hubs
- Front and rear Promax disk brakes work great, even in adverse conditions
