BikesGiantFORMA

Giant FORMA (Japan) geometry

Loading 3D view…
178 cm · 5 ft 10 in
auto85 cm · 33.5 in
Size S

Render Align 50%

Geometry

SizeXSSM
Stack mm515537560
Reach mm398401415
Head tube angle °71.072.072.0
Seat tube angle °75.074.074.0
Head tube length mm115135160
Seat tube mm465500535
Chainstay mm425425425
BB drop mm707070
Stack to reach1.291.341.35
Effective top tube mmi536555576
SizeSkey specs
Stack-to-reach (size S)1.34
More aggressive (lower and longer) than 96% of flat-bar frames in the database at comparable sizes.

Closest geometry matches (size S)

Matched by stack, reach and head tube angle.

More from Giant

Nearest size to the FORMA S.

Compare with another frame

Giant geometry chart · Frame stack and reach to the head tube top · Size finder assumes a 100mm stem on 20mm spacers · Report an error