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GuideRail Single Add-On

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Why We Like The RockyMounts GuideRail Single Add-On

We up the carrying capacity of the RockyMounts 2in Expandable GuideRail from its stock two-bike set-up to a three-bike rack with the GuideRail Single Add-On. This kit provides everything we need to ensure that the third-wheel to the day's bike adventure has a spot in the car. We love that it allows bikes to be loaded asymmetrically to eliminate any unwanted handlebar interference, and prevents contact with frames or forks by securing them with contact to the tires only.


  • Boost your GuideRail's bike-carrying capacity from two to three
  • Includes carrier and fittings to add to existing rack
  • Fits 20-29-inch wheels and MTB tires up to 5-inches wide
  • Compatible with bicycle wheelbases from 36 to 55-inches
  • Not for use with fender equipped bicycle
  • Lowers max weight capacity from 60 lbs per tray to 45 lbs per tray
  • Item #RMOY01Q
Bike Capacity
Guide Rail (2-inch Expandable)
Part Number
Claimed Weight
Manufacturer Warranty
limited lifetime
travel, biking

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