Triumph 660 Trident Chain Size and Sprocket Teeth
GarageDex's manufacturer-catalogue data shows the 2021-2026 Triumph 660 Trident uses a 520 chain with 16-tooth front and 51-tooth rear sprockets from the factory. (120 links)
Chain and sprocket fitment by year
| Years | Chain | Links | Front teeth | Rear teeth |
|---|---|---|---|---|
| 2021-2026 | 520 | 120 | 16 (JTF565RB) | 51 (JTR2020) |
Part numbers in parentheses are the manufacturer's stock-gearing sprocket codes, useful for matching a replacement.
Chain and sprockets for the Triumph 660 Trident
Match the pitch (520) and tooth counts in the table - chain and sprockets are a matched set, and a mismatched pitch will not fit the sprockets at all.
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Frequently asked
What chain size does a Triumph 660 Trident use?
GarageDex's manufacturer-catalogue data shows the 2021-2026 Triumph 660 Trident uses a 520 chain with 16-tooth front and 51-tooth rear sprockets from the factory. (120 links)
What is the stock gearing on a Triumph 660 Trident?
16-tooth front and 51-tooth rear from the factory, part numbers front JTF565RB, rear JTR2020.
What changes if I go +2 teeth on the rear sprocket?
Going up 2 teeth on the rear sprocket (or down 1-2 on the front) lowers the gearing: quicker acceleration off the line, but a lower top speed, and the chain usually needs to be 1-2 links longer to keep enough wrap on the front sprocket - a shop or the sprocket's fitment chart will confirm the exact link count for that combination. This is a generic mechanical rule, not a claim about this specific model's aftermarket options.
How many links does a Triumph 660 Trident chain have?
120 links at stock length and gearing, per the manufacturer catalogue.
Other Triumph models
Source: JT Sprockets - Online Catalogue, a chain and sprocket manufacturer's own application catalogue. Chain and sprocket sizing is factory-stock as JT publishes it - aftermarket gearing changes (see the FAQ) are not reflected here.