ALLOWS THE USE OF SHIMANO HT2 (DURA ACE, ULTEGRA, 105,
ETC.) OUTBOARD CRANK SETS
ON SPECIALIZED CARBON FRAMES WITH THE "OSBB" STANDARD!
-For ROAD BIKE applications
-Not for use on "triple" cranksets
-For OSBB standard (46mm BB Shell I.D. X 61mm Wide)
Hollowtech 2 cranksets only--NOT for GXP (SRAM)
RWC, we have paired the machining precision of KCNC with Enduro Bearings to bring you the best
OSBB to HT2 adapters available. The KCNC design offers several advantages, including
optimum bearing placement on the crank set spindle. The double O-ring seals on the "cups"
ensure a positive, creak-free fit regardless of BB shell tolerance variations. Because the two
halves thread together, when the bottom bracket is properly torqued, it becomes locked into place
within the bottom bracket shell. The aluminum body does not flex or distort under load. This
also forms a solid barrier from moisture that may be trapped in the bottom bracket shell.
carbon road frames with Specialized's own
"OSBB" standard are a unique adaptation of the "PF30" standard in that THEY ARE ONLY 61mm WIDE (standard
PF30 road width is 68mm). For this reason, this special bottom bracket assembly includes special
bushings for the bottom bracket shell. This kit contains everything you need to run Shimano road cranks (Dura Ace, Ultegra,
105, etc.) on your Specialized Carbon OSBB frame.
We are expanding our Angular Contact ENDURO bearing options
based on the superior performance and longevity of Angular Contact Bearings when used in bottom bracket applications.
Completely remove old bottom bracket and any cups,
adapters, and residual grease or Loctite from the carbon BB shell.
Grease and press in the Delrin
Grease the KCNC cups and press them into the Delrin Bushings.
properly tighten these threaded bearing cups, two Hollowtech II compatible tools will be required.
recommends tightening the cups to 35 Nm (300 inch-lbs) of torque.
Complete installation instructions
included with Bottom Bracket