Choosing the correct Mudwing mud flap size ensures optimal fit, appearance, and spray protection for your bike.
Size Options
We offer two Mudwing mud flap sizes:
| Size | Recommended For | Fender Width |
|---|---|---|
| Standard | Beach cruisers, road bikes, most e-bikes, commuter bikes | Standard width fenders |
| Large | Wide cruiser fenders, some fat tire bikes with standard fenders, oversized vintage fenders | Wider fenders |
How to Choose Your Size
Option 1: Measure Your Fender
Measure the interior width of your fender at the point where the mud flap will attach (typically at the rear):
- Under 2.5 inches → Standard size
- 2.5 inches or wider → Large size
Option 2: Match Your Bike Type
| Bike Type | Recommended Size |
|---|---|
| Beach cruiser (standard) | Standard |
| Beach cruiser (wide/balloon tire) | Large |
| Road bike | Standard |
| Commuter e-bike | Standard |
| Vintage cruiser | Standard or Large (measure to confirm) |
| City e-bike | Standard |
Important Notes
- Fat tire bikes (4"+ tires): Our Mudwing mud flaps are designed for standard fenders. For fat tire bikes, consider our dedicated Phantom, FeatherLight, or Otter Tail fat bike fenders instead, which provide complete coverage for wide tires.
- Both sizes feature: The same retro stitched-look design, durable molded rubber construction, and quick installation.
When in Doubt
If you're between sizes or unsure, the Standard size works for the majority of bikes. The flexible rubber construction allows it to adapt to slight variations in fender width.
Jan 13, 2026