Overview
There are many many 20-inch wheels bikes over the world, but with thin tire. As a result, they are fast but not as comfortable as wider tires.
So we are thinking how about build one extremely comfortable 20-inch wheels bike, and up to 20" 2.4 tires clearance can even support gravel riding.
Now the dream has come true. Standard Granite comes with BSA 68 bottom bracket, and EBB version ( Eccentric Bottom Bracket ) is designed for internal gear system or single speed.
Specification
Frame Material
Fork Material
4130 Cr-Mo , main triangle double buttered
4130 Cr-Mo
Max Tire (w/o fender)
Max Tire (w/ fender)
20" 2.3
20" 2.0
Fork Height
Fork Offset
320 mm
30 mm
Headset
Stem Clamp
34 mm (EC34/28.6 | EC34/30)
28.6 mm
Seat Post
27.2 mm
Seat Post Clamp
29.8 mm
Front Derailleur
Rear Derailleur Hanger
N/A
Integrated
Crank set
Bottom Bracket
68 mm BSA threaded
Front Brake
Rear Brake
IS Disc Brake, 160mm Rotor(max)
IS Disc Brake, 160mm Rotor(max)
Front Axle
Rear Axle
10-100 mm QR
10-135 mm QR
Rack Mount
Fender Mount
Front / rear rack compatible
Yes
Water Cage Mount
1 standard and 3 3-pack boss
Other Features
/
Geometry
Seat Tube (C-T)
Seat Tube (C-C)
Effective Top Tube
Chain Stay
Head Tube
Head Tube Angle
Seat Tube Angle
BB Drop
Standover *
Top Tube Angle
Reach
Stack
Fork Rake
Fork Steering Tube
Fork Axle to Crown
Wheelbase
S
420
380
530
420
190
73
72
30
687
6.4
380
462
25
400
320
975
30
S (EBB)
420
380
550
413~427
190
73
72
687
6.4
390
490
25
400
320
995
M (EBB)
380
340
550
413~427
220
73
72
30
670
14.3
390
490
25
400
320
995
L
460
420
570
420
240
73
72
30
727
7
404
509
25
400
320
1015
L (EBB)
460
420
585
413-427
240
73
72
30
746
6
416
519
25
400
320
1029