Skip to main content

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

Popular posts from this blog

Cannondale Trail SL 29 SS

The fat aluminium tubes are a constrast to the skinny items seen elsewhere in the test, but this rigid Cannondale uses them to create one of the most old-school - and lightest - rides here.

KONA SHRED

With a reputation for no-nonsense ruggedness and a background in the always progressive and punishing riding of Canada, Kona have been building hardcore hardtails for longer than almost anyone else. The Shred is the most expensive bike on test but it’s a proper trail tank.

SKS Airbuster CO2 inflator

The alloy Airbuster has a large knob so you can regulate the flow of gas, a mechanical stop to prevent the cartridge being pierced in transit and a dust cap to keep the valve free of debris. While it works with Presta and Schrader valves, switching between them requires a fiddly change of the valve head. The thin rubber sleeve doesn’t provide much protection from cold spent canisters. You can’t insert much of the valve into the inflator head, so you have to be careful to avoid leaks. Price $33 w/16g cartridge

Merida Big Nine 100

Wit the bikes swapped over, we head out on the same loop again, this time on the 29in Big Nine 100. Whereas the Big Seven was snappy off the line, the 29er takes a couple more pedal strokes to get up to speed. That said, once it's up there, it's easy to keep the big wheels rolling, allowing us to cover ground with ease. The fire road is at times a little rough, and the bigger wheels roll over the imperfections so we barely notice them.

Anthony Messere’s Morpheus Vimana Slope

A flying chariot built with one thing in mind – slopestyle domination