Compare loaded frame-bag or saddle-bag measurements with available space, record your required gap and mount permissions, and export unresolved checks as CSV.
Published and reviewed .
Spare space is available dimension minus loaded bag dimension. Negative spare means dimensional interference; spare below your entered requirement means that requirement is not met. Exact fit has no spare space. Missing dimensions, a missing gap basis or unknown mounting/measurement coverage prevent a complete check. No state is a universal safe verdict.
This is a manual worksheet, not photo AI or a manufacturer compatibility database. It cannot model frame contours, flex, bag sway, strap loads or mount strength. A stabilizer such as a Wishbone is not assumed to create clearance. Rack and component load limits are outside this tool.
Use the official tools for their own products. These are independent manufacturer resources, not BikeSize approvals.
Enter your measurements and requirement. Missing information will stay unresolved; no result is a riding approval.