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Shimano SLX M670 transmission

Shimano SLX M670 transmission

IF YOU'RE NOT bothered about weight, Shimano SLX is literally a super-solid, full feature gearset.

The angular rear mech looks great on aggro trail bikes and the thick, pressed steel inner parallelogram/ actuator arm creates a bombproof spine. There's a standard low-profile Shadow version but hardcore riders should pay 15$ more for the tension adjustable and on/off switchable chain-taming clutch of the Shadow + version included here. It's heavier than the XT mech though and the jockey wheels get lower quality bearings that are slightly less durable.

Lever throw before each shift is also noticeably longer than with XT, which means a maximum downshift of three rather than four gears per stroke. Individual shifts aren't as crisp and positive when new either, though it still stays functional in filth for significantly longer than SRAM's 2x10 gear.

The PTFE coated, asymmetric plate HG75 chain is a great blend of performance and price, and the HG81 cassette mounts the largest three sprockets on an alloy carrier to save 66g over the solid Deore block. It's still worth trading up to XT if overall bike weight or high mileage is a concern though, and Zee would be our choice if we were planning to build up a hardcore 1x10 bike.

WEIGHT 1,408g
FORMAT 2x10

PRICE 285$ (w/ Shadow Plus mech)

Shimano SLX M670 shifter

Shimano SLX M670 front derailleur

Shimano SLX M670 rear derailleur

Shimano SLX M670 crankset

Shimano SLX M670 cassette

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