Product
  • product description
  • target group
  • customer use
  • design
  • retrofit
  • technology
  • bicycles
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    retrofit

    GRUBER Assist is not dependent on the bicycle brand – required cycle frame specifications

    In contrast to the ready-made E-bikes, you have the advantage of being relatively brand-independent when buying a new bicycle.

    What you should look for in a frame if you want to install a GRUBER Assist:

    • Aluminium or steel frame (carbon currently in test phase)
    • Straight, continuous seat tube
    • Seat tube with an inner diameter of 31.6mm
      (This is given for a seat post with an external diameter of 31.6mm)
    • The existing seat post will be replaced with a Truvativ XR double clamp (included in delivery)
    • Crank set from Shimano Hollowtech II (not included in delivery)
    • Seat tube should be as central as possible on the bottom bracket (not shifted forwards or backwards!)
    • People with a step length under 80 cm should contact GRUBER Antrieb GmbH & Co KG or their dealer before installation. From the middle of the crank to the saddle (without saddle) the GRUBER Assist has a lenght of 57 cm.
    • Installation by a certified GRUBER Assist dealer

    Racing bike, Mountainbike, Roadster - Gruber Assist is not dependet on the bicycle brand

    The GRUBER Assist doesn’t have a blocking at 25 km/h and isn’t allowed for the public traffic. If you want this blocking, we certainly can install it for you.