1 Rear Derailleur Guide Pulley 10T Bike — SIMPLEX HURET SHIMANO

A 10T Guide Pulley for SIMPLEX, HURET and SHIMANO Derailleurs

Guide pulleys are the parts nobody notices until they stop turning. This one is a 10-tooth unit in plastic, offered as a used spare for rear derailleurs running on SIMPLEX, HURET or SHIMANO hardware. It belongs to the generation of derailleurs most often found on European bikes of the sixties, seventies and eighties — the kind still being ridden, still being repaired, and still worth keeping on the road.

Because it is a used item, minor cosmetic marks or traces of long storage may be present, such as micro-scratches. No structural defect is documented for this pulley.

Why a 10-tooth pulley is worth swapping

Chainline, shifting reliability and the general health of a rear derailleur depend on the pulley turning freely and meshing cleanly with the chain. On a period-correct build, sourcing a 10-tooth pulley that matches the cage and the drivetrain is often the difference between a derailleur that shifts and one that grinds. This one is listed for reference in a rear derailleur context, and it is compatible with the SIMPLEX, HURET and SHIMANO derailleurs indicated in its designation.

With three images provided, the visual record lets you check the tooth profile for yourself. The photos form an integral part of the description and should be reviewed alongside it.

Technical specifications

• Country of origin: China
• Material: Plastic
• Manufacturer part number: 0000

Pairing it with the rest of the drivetrain

If you are already working on a period-correct Simplex setup, the Huret vintage rear derailleur for old bikes is a logical companion piece. For a French drivetrain built around Simplex, the Simplex vintage rear derailleur for a 1960 Peugeot shows the sort of assembly this pulley commonly belongs to. And if you are still chasing the rest of the cockpit while the derailleur work is going on, the grips and handlebar tape range is worth a look.

Good to know before you fit it

This is a used component. Expect the small cosmetic marks that come with decades of storage and handling — nothing beyond that is documented for this reference. If you are matching a derailleur from a specific year, count the teeth on your current pulley and compare it with the ten visible here; that is the quickest way to confirm the match before you commit.