Chain Tensioner
A well-adjusted chain is essential for safety and power transmission. While modern frames mostly rely on integrated chain tensioners (for which we offer matching replacement bolts), old-school fans swear by external models. Below, we also explain why street riders often run their chains loose, while park riders keep them tight.
Chain Tensioner FAQChain Tensioner Range
Chain Tensioner FAQ
What is a chain tensioner and what is its main purpose?
A chain tensioner prevents the rear wheel from pulling forward due to the immense tension of the chain. It ensures the wheel sits centrally in the frame. Without a tensioner, you would have to pull the wheel back manually and tighten the axle nuts extremely hard.
What types are there?
The design depends entirely on your frame. We distinguish strictly between modern and classic:
- Integrated Chain Tensioners
- This is the current standard in freestyle. The frame dropout has a drilled hole with a thread. A small bolt is screwed through and pushes directly against the axle. We primarily offer the replacement bolts and knurled nuts for this.
- Classic External Tensioners
- For older frames or entry-level models without drilled dropouts. These tensioners slide onto the axle and brace against the end of the frame. They are a bit bulkier but indispensable for old-school frames.
Pro Tip: The right chain tension for your style
Not everyone rides their chain with the same tension. Depending on the discipline, there are clear preferences:
- Street (Crankflips): Many street riders run their chain slightly loose. This reduces friction on the driver and facilitates crankflips, as the crank spins more easily and isn't stopped immediately by chain tension.
- Flatland, Park & Trails: Here, a tight chain is usually preferred. This ensures instant engagement without delay, prevents chain slap during landings, and minimizes the risk of the chain coming off.
Which chain tensioner is right for my needs?
Check your dropouts carefully:
| Frame Type | Solution |
|---|---|
| Modern Frames | Usually have a small hole in the dropout. You only need the replacement bolts (often M4 thread). Check if these came with the frame or need replacing. |
| Older Frames / Oldschool | No hole available? You need an external chain tensioner matching your axle diameter (usually 14mm). |
How do I install chain tensioners?
- Loosen the rear wheel axle nuts.
- Integrated: Screw the small bolts into the dropout until they touch the axle. Turn them evenly on both sides to push the wheel back and center it.
- External: Slide the tensioner onto the axle, position it against the frame end, and tighten the adjustment nut.
- Tighten the main axle nuts firmly and then relieve the small tensioner bolts slightly so they are not under permanent stress/bending.
What do the specifications mean?
| Term | Explanation | Examples/Available |
|---|---|---|
| Axle Diameter | Only important for external models. | 14mm (Standard), 10mm (Race/Oldschool) |
| Thread Size | For integrated bolts. | M4 (common), M5 |
| Material | Material of the tensioner. | Steel, Aluminum (CNC machined) |
