Please ensure Javascript is enabled for purposes of website accessibility Expresso - Hardtail Mountain Bike (27.5") - Blue – DiamondBack
Expresso - Hardtail Mountain Bike (27.5") - Blue
Expresso - Hardtail Mountain Bike (27.5") - Blue
Expresso - Hardtail Mountain Bike (27.5") - Blue
Expresso - Hardtail Mountain Bike (27.5") - Blue
Expresso - Hardtail Mountain Bike (27.5") - Blue
Expresso - Hardtail Mountain Bike (27.5") - Blue
Expresso - Hardtail Mountain Bike (27.5") - Blue
Expresso - Hardtail Mountain Bike (27.5") - Blue
Expresso - Hardtail Mountain Bike (27.5") - Blue
Expresso - Hardtail Mountain Bike (27.5") - Blue
Expresso - Hardtail Mountain Bike (27.5") - Blue
Expresso - Hardtail Mountain Bike (27.5") - Blue

Expresso - Hardtail Mountain Bike (27.5") - Blue

The Diamondback Expresso 27.5" mountain bike is a great choice for ripping around on the trails. The lightweight hardtail design, quality Shimano components, including a Shimano cassette and 24-speed drivetrain provides the rider with a mountain bike that is made for exploring, with lots of gears to get you up and down the hills.

Expresso - Hardtail Mountain Bike (27.5") - Blue - infographic


  • Frame Specs: 6061 T6 heat treated aluminum frame
  • Rear Shock: N/A
  • Fork: Vaxa 100mm travel, with pre-load adjust
  • Cable Routing: External guided w/ full length housing
  • Rear Derailleur: Shimano Tourney TX800, 8 speed
  • Front Derailleur: Shimano TY700
  • Shifters: Shimano EZ Fire Plus ST-EF50, 3x8 speed
  • Cog Set: Shimano Hyperglide HG31 11-34T, 8 speed cassette
  • Chain: KMC Z8.3
  • Crankset: ProWheel Alloy, 9/16*170mm, w/ chainring cover
  • Bottom Bracket: Gineyea BB73-68, square taper, sealed cartridge
  • Front Brake: Tektro M280 Mechanical Disc W/ 160mm Rotor
  • Rear Brake: Tektro M280 Mechanical Disc W/ 160mm Rotor
  • Brake Levers: Shimano ST-EF50
  • Headset: Neco H-148, 1-1/8" threadless, Semi-integrated
  • Seat post: CAVU alloy, 27.2mm x 300mm
  • Handlebar: CAVU, 31.8mm*760mm
  • Stem: CAVU Alloy, 80mm, 7 degree rise
  • Saddle: CAVU MTB
  • Pedals: 9/16" Resin body, flats
  • Grips: CAVU Lock-on w/ closed end
  • Rims: CAVU Aluminum double wall, 36 hole, 27.5"
  • Front Tire: 27.5" x 2.25" for all-terrain
  • Rear Tire: 27.5" x 2.25" for all-terrain
  • Tubeless Ready: No
  • Front Hub: CAVU, 36 H alloy w/ quick release
  • Rear Hub: CAVU, 36 H, alloy, w/ quick release


  • Lightweight 6061 T6 aluminum frame with Diamondback's formed tubing features optimised wall thickness for a balance of strength, weight, and stiffness that translates to a responsive, and reliable ride
  • Vaxa 100mm travel front suspension fork with adjustable preload soaks up the bumps and offers smooth and confident control over various terrain
  • 27.5" x 2.3" aggressive MTB tires for traction that will bite into any trail conditions
  • Tektro mechanical disc brakes make for sure stopping power in both wet and dry conditions
  • Shimano 24 speed drivetrain with EZ-Fire shifters offer precise and deliberate shifting so you can tackle new terrain with confidence
  • Easy dependable resin flat pedals so you can jump on your new Diamondback back and ride with confidence
  • CAVU Comfort-Mountain saddle is equipped with a quick release seat post clamp so it's always easy to find the perfect saddle height.
  • CAVU Lock on grips for a confident and reliable connection point in wet or dry conditions

In Action


Customer Reviews

Customer Reviews

Based on 7 reviews Write a review

Customer Reviews

Based on 9 reviews
Awesome bike

Awesome bike hold up amazing. I rode it through the rain and brakes worked awesome the disk brakes are just amazing and the gram size was perfect for me I got a large and I’m around 5 feet 10 inches tall only thing that I would change (only because of preference) is that you could put 29 inch wheels on it but it’s not that big of a deal honestly and the fork is adjustable which is nice and it absorbs impact perfectly and the bike grips are amazing in the rain they wear not slippery at all and super easy to grab shifting gears is also very nice down shifting can take a second sometimes but overall I wouldn’t change the mechanisms unless I had to. Overall if you do some mediocre mountain biking or you bike around your town or city and go off road it’s awesome I’d recommend it.

A decent mountain bike for the price point with all the trimmings

Bought two of these for our nephews because they were growing out of their old bikes. The aluminum frame appears sturdy and noted a decent component set but would have preferred a full Shimano setup. The rear derailleur was a Microshift and the rear cassette was a mystery brand. Time will tell how these hold up. A few things though. The OEM seat clamp on one bike had stripped threads and because the seats are removed to deter theft, it came apart after a few days of use. I replaced it with a $10 part from MEC, which is definitely more robust. Finally, set up at Sport Check was questionable. The rear cassette on one bike was not properly torqued and came apart and caused the high gears to slip on the first day of use. Good thing I had the proper tool and torque wrench. For safety I pulled the rear wheel on the other bike and the rear cassette, while not loose yet, was not properly torqued either, so I'm sort of disappointed with the 'professional' assembly service on such a critical component. Otherwise, the boys like their bikes, so overall mission accomplished.

Good bike. Good value

Great bike. Great value. The XL is a good size for me as im 6'2"

Customer provided ratings only review

Customer provided ratings only review

1 out of 2 would buy again

I purchased 2 of these bikes online. Important to note they get delivered to your home address, not the store. There isn't much to assemble on them, but they don't include assembly instructions so, you may need to contact the store to get them assembled and tuned. Our local store was able to get us in for a same day tune up that took about 30 min.

The bikes seem to be descent quality, I don't want to say 'for the price' because it isn't exactly a low price point, but you do seem to get good value for the price.

The one disappointing issue was that one of the bikes was clearly a return, floor model or something similar because it arrived with some heavy scratches on it. This was not just an aesthetic issue either because the brake lever had a large spot that was ground down to the metal giving it a sharp edge right on the spot where you grip it. Had it been listed and sold as a second, refurbished or something similar I wouldn't have issue with it, but a new bike should not have those types of issues.

Overall, 1 out of 2 would buy again.