The Primos Mono ATB is a new budget-focused offering from the small bike company in Portland, Oregon. With clearance for 27.5 x 2.4″ tires, hydraulic brakes, a microSHIFT drivetrain, and a double-butted 4130 frame, this looks like a solid entry-level option for bikepackers…

The latest model from the small but mighty bike company out of Portland, Oregon, is the Primos Mono ATB. Garnering quite a bit of attention last year through the release of their Dame model, the Primos Mono is an even more capable ATB-style platform consistent with the hallmarks of the small brand. Focusing on affordable, approachable steel options, founders Carlos and Pasqual have conjured up an interesting package with their new ATB. As with the Dame, the Primos Mono ATB seems like an extremely valuable option given the price and spec.

Primos Mono ATB
  • Primos Mono ATB
  • Primos Mono ATB
  • Primos Mono ATB

With the distinct lack of a bikepacking middle class, it’s nice to see a smaller and newer brand focus on affordability first. Where we’ve seen brands cut some corners in the past with regard to important but often overlooked elements of the build kit, the Primos Mono ATB seems to have everything a beginner bikepacker might need in order go on a few trips without feeling like they’re in dire need of an upgrade. Shimano’s MT-200 hydraulic brakes are some of the most beloved budget brakes out there, and microSHIFT’s Advent X system leaves little to be desired.

  • Primos Mono ATB
  • Primos Mono ATB
Primos Mono ATB

Though their original Dame gravel bike now comes in four sizes (S-XL), the Primos Mono ATB only comes in two size offerings at the moment (M and L). With a suggested rider height that spans a solid range, it’s smaller rides who might feel left out on this one. That said, a suggested height range from 5’5″ to 6’3″ across both sizes covers most average heights, and, if the Mono is successful, it should be produced in a more complete size range.

Primos Mono ATB Spec

  • Frame: Primos Double-Butted 4130 Chromoly
  • Fork: Primos 4130
  • Crankset: Prowheel CR099A
  • Derailleur: Microshift Advent X
  • Shifter: Microshift Advent X
  • Cassette: Microshift Advent X 11-48t 10-speed
  • Bottom Bracket: 68mm threaded
  • Wheelset: Novatec hubs with double butted spokes, brass nipples, and alloy rims
  • Tires: Continental Cross King 27.5″ x 2.2″
  • Headset: XR-W35
  • Handlebar: UUR 6061 alloy
  • Stem: UUR 6061 alloy
  • Saddle: Selle Royal A086
  • Seatpost: UUR 6061 alloy
  • Seat Clamp: CNC alloy, anodized finish
  • Brake Levers: Shimano MT-200
  • Brake Calipers: Shimano MT-200
  • Rotors: 6-bolt 160

Primos Mono ATB Geo

Size MD LG
Effective TT Length 584 617
Reach 391 421
Wheelbase 1072 1072
CS Length 445 445
Effective ST Angle 72 72
ST Length 453 499
HT Angle 70 71
HT Length 163 167
Rake 45 45
BB Drop 65 65
Stack 584 603
Rider Height 5’5″-5’9″ 5’10”-6’3″

Retailing at $799 USD for a complete (roughly $850 with shipping), it’s hard to ignore the value given whats on offer here. Available in two colors, Amazonian Blue and Dusty Rose, there’s a solid color palette to build on. With a decent number of rack and fender mounts through a fork that maintains a classic, bi-plane look but with the versatility of three-pack mounts, we’re excited to see what people do with what appears to be a great platform for adventure riding and bikepacking.

For more on the Primos Mono ATB, visit PrimosCycles.com.

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