Mountain Bike Action Bike Test: KHS Sixfifty 6555+E Trail Bike

KHS Sixfifty 6555+E Trail Bike

Founded in 1974, KHS’ goal from the beginning has been to distribute moderately priced, high-quality bicycles. Since their earliest days, the brand has desired to be a player in every segment of bicycles. To this day, they’re still owned by the same family, and now they’ve stepped into the e-bike market with a line of four bikes—two of them aimed at off-road—with the SixFifty 6555+E being their sole full-suspension mountain bike entry.


KHS chose a double-butted, custom-formed aluminum frame over carbon, but they’ve somehow managed to make a bike that isn’t too expensive as far as the full-suspension e-bike field goes, and still kept it well under 50 pounds.

The bike is set up with Fox Float suspension, including an e-specific 34 fork in the front and DPS rear shock that offers 150mm of travel in the rear. Overall, it’s a pretty plush ride. There are some bikes going up to 180+mm of travel, but 150mm of well-set-up travel makes for an amazing ride that isn’t crazy tall.

The front end is pretty slack to make it forgiving over big bumps. The head tube angle is 67.5 degrees on all sizes of the frame.

A very compact SunRace 11-46T cassette offers all the range you’ll need.


WTB Scraper rims are laced to Formula TD711 hubs with thru-axles and Boost spacing for added rigidity and strength. The drivetrain is a Shimano XT shifter and derailleur. There’s a KMC chain that’s not…

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