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Rear Der
ailleur
Inst
allation
B-knuckle spring bolt
Metron Rear Derailleur Installation Instructions
Published – Aug, 2015. ZSP013.v0 © Full Speed Ahead
Install rear derailleur to the derailleur hanger using 5mm Allen key. Tighten to 80-100 kgf.cm / 8-10Nm / 70-90
in.lbs. Make sure both the B-tension screw and the pulley cage do not interfere with the dropout tab during
assembly. If necessary, extend the pulley by hand.
(Recommend use grease on the B-knuckle spring bolt thread before installing to hanger)
Introduction
Congratulations on your Vision product. Please read these instructions and follow them for correct use. Failure to follow the
warnings and instructions could result in damage to product not covered under warranty, damage to bicycle; or cause an accident
resulting in injury or death. Since specific tools and experience are necessary for proper installation, it is recommended that the
product be installed by a qualified bicycle technician. FSA & Vision assumes no responsibility for damages or injury related to
improperly installed components.
Warranty
Full Speed Ahead (FSA) warrants all FSA, Gravity, Vision, Metropolis and RPM products to be free from defects in materials or
workmanship for a period of two years after original purchase unless otherwise stated in the full warranty policy. The warranty is
non-transferable and valid to the original purchaser of the product only. Any attempt to modify the product in any way such as
drilling, grinding, and painting will void the warranty. For more information on warranty policy and instructions for completing a
warranty claim, check out the Full Warranty Policy found at our website: http://www.visiontechusa.com/support/warranty-policy/
Specification
RD-VT-801 / Metron Rear Derailleur
Components
Follow the assembly order in the illustration:
Chain length
With the chain on the biggest chainring at the front and on the smallest cassette cog at the rear, the guide
pulley (upper) and tension pulley (lower) of the RD should be in vertical position. (allowed 2 links more)
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Tig
hten Unt
ighten
Connection and securing of the cable Low Limit adjustment Top Limit Adjustment
Fully tighten the cable tension adjuster, insert the cable and fix it under the cable pinch washer, making sure
that the cable is properly positioned inside the groove in the washer as per below picture. Tighten to
50 kgf.cm / 5Nm / 45 in.lbs.
Groove
Cable tension adjustment B-tension adjustment screw
With the chain on the 3rd cog, start tightening the cable adjustment until the chain is slightly rubbing again the
4th cog and make noise. Then untighten the cable for half a turn and check there’s no more noise.
Please note that especially when installing new housing you might repeat this operation after a few ride since
the initial settlement of the cable, housing and housing terminal, could slightly decrease the tension in the
cable.
Tighten
Adjust the Low limit screw until the upper pulley
is aligned at the outside line of the smallest cog.
Adjust the Top limit screw until the upper pulley is aligned
directly under the inner cog and is limited from moving
further inboard.
Low
Adjust the preload of the B-knuckle spring using the B-tension screw.
If the tension is correct when the chain is on the big chainring at the front and smallest cog at the rear, there
will be 1-1.5 links between the cog and the upper pulley.
B-tension screw B-knuckle spring
Top
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