Light Bee vs Ultra Bee: Wheel Fitment Explained
Light Bee and Ultra Bee wheel kits can both be described as 17-inch supermoto sets. That shared number is not a fitment guarantee. Choose by the exact bike application first, then compare the front and rear dimensions and the parts supplied.
What the TXC listings actually show
| Published specification | CST Light Bee kit | Standard Ultra Bee kit |
|---|---|---|
| Front rim | 17 × 1.60 inches | 17 × 2.50 inches |
| Rear rim | 17 × 2.15 inches | 17 × 3.50 inches |
| Front tire | 70/90-17 | 100/80-17 |
| Rear tire | 90/80-17 | 130/70-17 |
These numbers describe the two linked TXC kits, not every wheel made for either bike. The different widths are a useful reminder that matching diameter alone is insufficient. Hub, axle, spacer and brake mounting requirements also need to match the intended application.
Read the kit contents separately
The 17-inch CST Light Bee Supermoto Wheel Kit lists assembled front and rear wheels, CST pavement tires, tubes and front axle bushings. Check the current selected option and listing before buying any additional parts.
The standard Ultra Bee Supermoto Wheel Kit explicitly says rotors and a sprocket are not included. Do not carry assumptions about one kit's contents over to a different bike's kit.
Build a fitment checklist for your own bike
- Bike identity: record the exact model and year. “Surron” alone is not specific enough.
- Current hardware: note aftermarket forks, calipers, rotors, swingarm changes and other parts around the wheels.
- Required interfaces: confirm axle and spacer requirements, rotor mounting and alignment, sprocket fitment and tire clearance for the actual kit.
- Included parts: check the selected option, not just the main product image.
A product marketed as “Ultra Bee” may describe a brake component used inside a conversion kit for another bike. Read the full application and selected mounting option. The component name by itself does not identify the bike the complete conversion is intended to fit.
What to send us if you are unsure
Share your bike model and year, a link to the exact kit, and photos of your current wheel and brake setup. Include a list of changed parts. That gives TXC useful information to check instead of asking you to guess from a photo.
Use an explicitly supported kit for your bike. Have any proposed cross-model conversion confirmed before buying parts; this guide does not establish a conversion procedure.
Choose the right starting collection
Browse Light Bee wheels or browse Ultra Bee wheels. For more detail on the Ultra Bee options, read our Ultra Bee supermoto wheel buying guide.
Kit specifications checked against the linked TXC listings on September 13, 2026. Current product descriptions and selected options take priority when confirming an order.
