ROCKERBONE // ROCKER DROPOUT TENSIONER

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ROCKERBONE // ROCKER DROPOUT TENSIONER

from $20.00

The Campestral ROCKERBONE is designed to work with Rocker-style dropouts only. 
ROCKERBONE provides a simple and precise means of tensioning Rocker-style dropouts with two tool options:
- standard 19mm open end wrenches in the shop
- standard 8mm hex wrenches on the go

Ideal for use with Gates Carbon Drive belt systems. Works with chains, too!

[INFO] << ASSEMBLY INSTRUCTIONS & PRODUCT DETAILS

COLOR:
BOLTS:
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MATERIAL: Cast Aluminum
FINISH: Hard Anodized
DIMENSIONS: 68x19x9 mm
WEIGHT / TITANIUM BOLTS: 66g
WEIGHT / STAINLESS BOLTS: 85g

:: Proprietary casting, finish machined to precise tolerances, and hard anodized for strength and durability.

:: Works with 8mm hex or 19mm standard wrench.

:: Lightweight, convenient, effective, and affordable.

:: Ideal for use with Gates Carbon Drive belt systems. Works with chains, too!

:: 8mm hex fitting is slightly oversize to provide for real-world conditions and the presence of dirt or debris.

:: Increased surface area interface with the dropout provides more clamping purchase.


TITANIUM ROCKERBONE KIT INCLUDES:
2x) PDX TI RockerBones (black or silver)
4x) Stainless Steel M8 Recessed Washers
4x) 6/4 Titanium M8 x 1.25 x 18 socket head bolts

 

STAINLESS STEEL ROCKERBONE KIT INCLUDES:
2x) PDX TI RockerBones (black or silver)
4x) Stainless Steel M8 Recessed Washers
4x) Stainless Steel M8 x 1.25 x 18 socket head bolts


PLEASE NOTE: To work properly, the ROCKERBONE must be used with the included bolts, which are specifically machined for full thread engagement and made to the appropriate length. (Stock M8 adjustable dropout bolts are too short to provide enough thread engagement when used with a ROCKERBONE and washer. Using a longer bolt will result in interference with cassette lockrings.)

For more information about Rocker-style dropouts, please consult Paragon Machine Works.



DIRECTIONS

  • 1) Ensure that all dropout surfaces -- frame, insert, ROCKERBONE -- are clean, dry, and free of any grease or lubricant.

  • 2) Using the supplied hardware, assemble each dropout as normal, with the ROCKERBONE between the bolt/washer and the frame, with the thicker end toward the front of the bike.

  • 3) With belt/chain engaged with ring/cog and ready to tension, pull the wheel rearward by hand as normal until approx. 90% of desired tension with the rear axle perpendicular to the frame centerline.

  • 4) Lightly torque Right/Drive side bolts until dropout stays in position (approx. 8Nm).

  • 5) Pull the Left/Non-Drive side Rocker an additional 5mm rearward, displacing the wheel slightly to the left of frame centerline, and tighten bolts enough to prevent further movement (approx. 12Nm).

  • 6) Using a 19mm open wrench or an 8mm hex wrench on the Right/Drive side ROCKERBONE, rotate the tool downward (clockwise) until desired tension is reached. Torque bolts to 25Nm/18ft-lbs as specified by Paragon Machine Works.

  • 7) If necessary to center the wheel, follow the same procedure on the Left/Non-Drive side ROCKERBONE, rotating the tool downward (counter-clockwise) until the wheel is centered. Torque bolts to 25Nm/18ft-lbs as normal.

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NOTICE: All Portland Titanium LLC retail products previously offered under the PDXTI name have been incorporated into the CAMPESTRAL brand, which is sold and distributed exclusively by RADHAUS.