0:00 drivetrain problems
0:51 1. teeth number
3:31 2. chainring mount
7:41 3. chainline / offset
8:54 3 mm boost offset
9:50 chainline measurement
10:55 O.L.D. explained
13:57 4. chainring model
14:31 dremel hack
16:10 5. Shimano 12s only
17:27 YOUR TEST
B.C.D. Bolt Circle Diameter = P.C.D. Pitch Circle Diameter
How to calculate B.C.D.:
- 5 bolt chainring
A x 1.701 = B.C.D. ("A" is center-to-center dimension between bolt)
EXAMPLE 64.7 mm x 1.701 = 110 mm B.C.D.
- 3 bolt chainring
A x 1.155 = B.C.D.
Where to buy:
Shimano 12 speed chainrings amzn.to/3L1UWZ7
Sram 12 speed Boost chainring amzn.to/4c0bFYk
Sram 12 speed 6 mm non - Boost offset amzn.to/3XEOI95
Shimano 12 speed Deore cranksets amzn.to/3z31cwP
Негізгі бет Тәжірибелік нұсқаулар және стиль 5 steps to replacing chainrings. New and old drivetrains. Bike Service School. Lesson 9.
Пікірлер: 10