Many rear bike racks have raised side edges (curved, not flat), which can create a gap between the rack and the flat surface of the Granny Wheels rack expander. Since the height of these raised edges varies from bike to bike, we came up with a support solution that can adapt to all of them.
The Universal Spacer Pad
Each kit will now include a 7 mm thick flexible pad.
This material is:
- Firm enough to support weight,
- Flexible enough to fold, layer, and conform to any rack shape,
- Durable and weather-resistant,
- Non-slip, ensuring stable contact under the expander.
How It Solves the Problem
Because you can either cut it or fold it, the spacer can be used in multiple thicknesses:
- One layer → 7 mm
- Two layers → 14 mm
- Three layers → 21 mm
- And so on…
Users simply fold (or cut and layer) the pad until the expander sits perfectly level on their specific rack.
Why This Works
- It instantly eliminates the center gap created by the raised edges.
- It creates a flat, solid platform for the rack expander.
- It prevents rocking or flexing.
- It allows universal compatibility without guessing rack dimensions.
Included in Every Kit
Because we can’t predict which bikes have raised-side racks, the spacer pad will come standard in every Granny Wheels rack expander kit.