GM - mountain bike.
1.Size: 26",24",22",20".
2.Stem: (OD) 25.4m/m ~ 28.6m/m.
3.Crown: one piece forged alloy lug.
4.Damper: elastomer & spring.
5.Blades: one piece alloy stamped ends and forged alloy ends.
6.Brace: light alloy.(v-brake, cantilever, caliper).
7.Travel: 60m/m, 40m/m, 30m/m, 30m/m.