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Diamondback Atroz Comp 27.5in Complete Mountain Bike - 2017


Item # DMB004I

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  • Black, S ($1,500.00)
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Item # DMB004I

Slay singletrack without blowing the bank.

As much as we love mountain biking here at Competitive Cyclist, we can't argue that it's often on the higher end of most people's affordability scale, often exceeding the budgets of entry-level riders, or at the very least, stretching things to the absolute limit. This budget busting is amplified by full-suspension bikes, which are inherently more complex, causing the price to go up due to additional engineering needs. However, every now and again you'll find brands like Diamondback satisfying the entry-level trail rider with the Atroz Comp 27.5in Complete Mountain Bike packing reliable components and a single-pivot suspension design that's affordable, easy to service, and fun to ride on the trail. Best of all, its relatively affordable price leaves room for trips to trail networks in the mountains and future bike upgrades down the road.

Diamondback is able to shave off skyrocketing costs associated with full-suspension bikes by engineering the Atroz Comp with a single-pivot suspension. Although a relatively simple design, this single-pivot suspension performs admirably on the trail, soaking up small imperfections and bigger trail obstacles with 120 millimeters of travel. The suspension's sealed cartridge bearings keep nasty muck and dirt from compromising performance over time, which is a nice feature when you're getting this bike dirty on the trail. Furthermore, higher chainstays eliminate chain slap when you're rallying across rough terrain on the trail.

Looking at the Atroz Comp's geometry, you'll find it's comfortable and composed tackling aggressive sections of trail thanks to its 66.5-degree head tube angle, paired with 17.1-inch chainstays for relatively quick and snappy handling around corners. The bike's sturdy 6061-T6 aluminum frame delivers high levels of durability, so you're not worried about pushing the bike to the limit. Up front, 120-millimeters of suspension is handled by a RockShox Recon Silver fork (coil version), which works well at smoothing out trail imperfections, such as rocks and roots. Another notable feature is the SRAM NX 11-speed drivetrain, which does away with pesky front derailleurs in favor of a larger 11 to 42-tooth cassette for ample low-end on long climbs.

  • Full-suspension trail bike at an affordable price
  • 120mm of single-pivot travel smooths out rocks and roots
  • 6061-T6 aluminum frame ensures durability on the trail
  • 66.5-degree head tube angle lends composure on descents
  • Higher chainstays prevent dreaded chain slap on rear end
  • 120mm RockShox Recon Silver Fork smooths out trail imperfections
  • NX 11-speed drivetrain with 11-42t cassette for spinning up climbs

Tech Specs

Frame Material:
6061-T6 alumium
Optimized Single Pivot
Rear Shock:
Rock Shox Monarch R
Rear Travel:
Rockshox Recon Silver Coil
Front Travel:
FSA No.57, sealed cartridge
SRAM NX 11-speed, X-Actuation Trigger
Front Derailleur:
Rear Derailleur:
SRAM NX X-Horizon, 11-speed
SRAM NX 1x, w/X-Sync 30t chainring
Bottom Bracket:
11-speed (11-42t)
SRAM PC-1130, 11-speed
Tektro Gemini
Brake Type:
hydraulic disc
[front] 180mm, [rear] 160mm
Race Face Respond
Handlebar Width:
Diamondback 4L lock-on
Race Face Respond
Stem Length:
Diamondback Sync'r
Alloy micro-adjust
Seatpost Diameter:
Diamondback SL-7 Doublewall (32-hole)
32-hole SL-7 (alloy)
Front Axle:
15 x 100mm thru-axle w/quick-release
Rear Axle:
12 x 142mm thru-axle
Kenda Nevegal Lite
Tire Size:
27.5 x 2.35in
Claimed Weight:
Recommended Use:
Manufacturer Warranty:
5 years on frame

sizing chart

Bike size by rider height


Geometry chart


Geometry Chart


Atroz Comp

Seat Tube


Effective Top Tube






Stand Over

Head Tube


Head Tube Angle


Seat Tube Angle


Bottom Bracket Height




S 15in 21.6in 22in 14.7in 29.7in 4.3in 66.5° 72.5° 0.4in 17.1in 43.1in
M 16.9in 23in 22in 16.1in 30.3in 4.3in 66.5° 72.5° 0.4in 17.1in 44.5in
L 18.9in 24.2in 22.4in 17.1in 30.5in 4.7in 66.5° 72.5° 0.4in 17.1in 45.7in

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