Merida eOne-Sixty SL 10K

The Merida eOne-Sixty SL 10K sits at the top of Merida's UK-listed SL range, and it's built for a fairly specific kind of rider: someone who already knows their way around a 160mm-travel enduro bike and wants the assistance to feel like a boost rather than a replacement for their own effort. Instead of chasing the biggest battery or the most torque, Merida has paired a carbon enduro chassis with Bosch's lighter-touch SX motor and dressed it in some of the best suspension, braking and shifting available. That combination is what makes the 10K worth a closer look if you ride technical trails and want the bike to feel active underneath you rather than simply carrying you up the hill.

What the Bosch SX motor asks of you

The 10K's motor is a Bosch Performance Line SX, paired with an integrated, fixed 400Wh CompactTube battery. It's a deliberately lighter-assistance system than the bigger CX motors found on heavier enduro e-bikes, and that's the point: it's there to extend a technical climb rather than flatten it. An independent test of the Long-size bike found the seated position worked well on steep technical climbs, and that the SX motor gave its strongest support when the rider kept spinning at a high cadence rather than grinding a low one. If you're used to mashing a big gear uphill on a full-power system, this one will ask you to change your pedalling habit rather than doing the work for you.

Because the battery is built into the frame rather than removable, charging means bringing the bike to a socket rather than carrying a battery indoors. If you want more range, Merida offers a 250Wh PowerMore extender as an add-on, bringing combined nominal capacity to 650Wh, though fitting it takes over the bottle-mount position in the downtube, so you'd be choosing between a water bottle and extra range on the bike.

Suspension, brakes and shifting built for hard riding

The 10K backs its 160mm-travel CF4 carbon frame with a Fox 36 Float Factory fork and a Fox Float X Factory shock, the kind of top-tier suspension you'd expect on a bike aimed squarely at enduro riding rather than gentle trail use. Shifting comes from SRAM's XX Eagle AXS Transmission, a wireless 12-speed groupset with a 10-52-tooth cassette, which removes derailleur cables from the equation and keeps shifting precise even under load on rough ground. Braking is handled by SRAM Maven Ultimate four-piston brakes with 200mm rotors front and rear, designed with descending confidence rather than weight-saving in mind. Together, this spec sits above the SL 8000 and SL 6000 in Merida's UK-listed SL range, making the 10K the equipment ceiling for anyone wanting the CF4 platform without stepping up to a heavier, more powerful motor system.

Wheels, tyres and finishing kit

The wheelset is a 29-inch FSA carbon build with 30mm internal-width rims, mounted with a Maxxis Assegai up front and a Minion DHR II out back, both in tougher EXO+ casings, a sensible pairing for enduro-style grip and puncture resistance. A Fox Transfer Factory dropper post and Bosch's Purion 400 display complete the control cockpit; the dropper's 210mm drop was measured on the test bike's Long size, so exact travel may vary by frame size. Merida quotes an approximate weight of 19.5kg for the build, and an independent review separately weighed a Long-size test bike at 19.6kg, which lines up closely.

For riders curious about mixed-wheel setups, Merida's flip-chip allows the rear wheel to be swapped to 27.5 inches while, according to Merida, preserving the bike's reach, stack and head and seat angles; the manual notes the chainstay shortens by 4mm in that configuration.

Choosing your size

Merida's UK 10K listing covers four frame sizes, labelled Short, Mid, Long and XLong, which retailer height guides sometimes shorten to S, M, L and XL. Each is matched to a height band rather than an inseam figure. Reach grows from 443mm on the Short to 512mm on the XLong, so it's worth checking the full geometry alongside the height guidance rather than picking on height alone, especially if you sit near the edge of a band. All sizes come with 29-inch wheels as standard, with the 27.5in rear conversion available across the range.

SL 10K versus the standard eOne-Sixty 10K

It's easy to conflate this bike with the standard eOne-Sixty 10K, but they're different machines. The SL 10K described here uses the lighter-assistance Bosch SX motor and a 400Wh battery, while the standard, non-SL eOne-Sixty 10K uses a Shimano EP801 motor and a larger 600Wh battery. If maximum range and torque matter more to you than the lighter, more active feel described above, the standard 10K is the more relevant alternative to compare against, rather than assuming both bikes are simply badge variants of the same spec.

One ownership point worth building into your budget: Merida calls for an initial inspection within its stated early-use interval, and asks that the suspension be serviced by a dealer at least once a year, a fair expectation given how hard the Fox 36 and Float X units will be worked on technical trails.