8.. Headset bearing
Every carbon frame set is delivered with a
semi-integrated headset that is already fitted.
The included flat bearing shells made of alu-
minium must be mounted with specific tools.
Be sure to read the operating instructions for
carbon forks in chapter 28.3
“Carbon forks”
,
before doing any work at the fork.
8..5 Bottom bracket bearings
All MTB frames: BSA thread: 1.370”x 24 TPI,
(left handed thread on right side).
The width of the shell is 73 ± 0.5 mm.
All road bike frames: BSA thread: 1.370”x
24 TPI, (left handed thread on right side).
The width of the shell is 68 ± 0.5 mm.
exactly with a specialist facing tool, otherwise
the bearings might not run perfectly in line.
Observe the bottom bracket manufacturer’s
torque specifications.
8..6 Chainsuck protection
To protect the sensitive surface of the bottom
bracket area against rupture through chain
suck (the chain getting stuck between frame
and chainwheel), there is a protection plate
made of stainless steel fixed on every carbon
mountain bike hard tail frame. Make sure the
protection is located in the correct position, at
the chainstay close to the chain rings.
8. MERIDA framesets
The diameter of the steerer tube for the
MERIDA carbon models is 1 1/8” = 28.6 mm
on the upper and bottom side. The outside
diameter of the bearing shells at the steer-
ing head bearing is 50 mm; the diameter of
the flange of the shells to be pressed into the
frame is 44.05 + 0.05 mm.
Common cartridge bearings can be mounted
directly with high-grade grease. For special
bottom brackets with unconnected left and
right side bearings, for example Hollowtech
II (e.g. Dura-Ace, Ultegra, XTR, XT and LX
bearings) the ends of the shell can be aligned
