star(s) from 9 reviews.

Availability: In stock

The most capable aluminum hardtail in our lineup.
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Sync'r 27.5

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Versatile — that’s what’s always made our progressive trail bikes popular. These are bikes that are as at home blasting down trails alongside long-travel, full-suspension bikes at they are surfing mellow sections of singletrack. The Sync’r is our top of the line, do-it-all aluminum hardtail.

The heart of the bike is a low-slung frame that’s both playful and confident. We’ve hung the Sync’r chassis with equally stellar components that include a RockShox Recon RL suspension fork with 140mm of travel, a Race Face/Shimano SLX single-ring drivetrain that’s free of clutter and bangs off precise shifts under pressure, powerful Shimano hydraulic disc brakes, and our own Diamondback AL35 tubeless-compatible wheelset.

The Sync’r holds its own with no-nonsense hardtail precision and all-mountain capabilities, making it a great choice for any mountain biker.

Frame 6061-T6 Butted Alloy for 27.5", Tapered Head Tube, Formed Top and Down Tube, w/ Integrated Disc Brake Tabs, Progressive Geometry, 148x12MM Thru-Axle for Maxxel
Fork Rockshox Recon RL, Solo Air, 140mm Travel, 32mm Stanchions, 15mm thru axle, Tapered Steerer Tube, w/ Turn Key Lock out
Headset FSA NO.57, Sealed Cartridge for Tapered Headtube
Cranks Raceface Æffect Cinch w/ Steel 30T "Narrow Wide"
Bottom Bracket Raceface Outboard Bearing
Rear Derailleur Shimano SLX 11 Speed Shadow
Shifter Shimano SLX 11 Speed
Cogset Shimano SLX 11 Speed 11-46T
Chain KMC X11; 11 Speed
Front Hub 32h Alloy, 110x15mm Thru-axle, Sealed Cartridge Bearings, w/ CNC Disc Mount
Rear Hub 32h Alloy, Boost 148x12mm Thru-axle, 2 Sealed Cartridge Bearing, for SRAM XD w/ CNC Disc Mount
Spokes 14g Stainless Steel
Rims Diamondback AL35, Tubeless Ready, 32h
Tires Vee Rubber Corwn Gem 27.5x2.8
Brakes Shimano MT500 Hydraulic Disc, w/ 180mm Front and 160mm Rear Rotors
Brake Levers Shimano MT500 Hydraulic
Pedals DB4L Alloy Platform w/ Replaceable Pins
Handlebar Raceface Chester, 780mm Wide, 35 Bar Bore
Grips New DB "Flanged" Lock-on, 135mm Silcone
Stem Race Face Chester, 40mm Reach, 35 Bar Bore
Seat DB Sync'r Saddle
Seatpost DB Alloy Micro Adjust, 30.9mm
Extras Tool Kit,
Type configurable
Bike Size S/16 5'4" - 5'7" M/18 5'7" - 5'10" L/20 5'10" - 6'1" XL/22 6'1" - 6'4"
Seat Tube Length 420.0mm 460.0mm 500.0mm 560.0mm
Stand Over Height 736.0mm 757.0mm 791.0mm 823.0mm
Top Tube Length 591.0mm 606.0mm 625.0mm 645.0mm
Stack 584.0mm 584.0mm 598.0mm 611.0mm
Reach 423.0mm 440.0mm 453.0mm 469.0mm
Head Tube Length 110.0mm 110.0mm 125.0mm 140.0mm
Head Angle 66.0° 66.0° 66.0° 66.0°
Seat Angle 74.0° 74.0° 74.0° 74.0°
Wheel Base 1136.0mm 1152.0mm 1172.0mm 1194.0mm
Chain Stay Length 435.0mm 435.0mm 435.0mm 435.0mm
Fork Offset 42.0mm 42.0mm 42.0mm 42.0mm
BB Drop 55.0mm 55.0mm 55.0mm 55.0mm
Stem Length 45.0mm 45.0mm 45.0mm 45.0mm
Handlebar Width 785.0mm 785.0mm 785.0mm 785.0mm
Crank Length 170.0mm 175.0mm 175.0mm 175.0mm
Seat Post Length 350.0mm 350.0mm 350.0mm 350.0mm

Customer Reviews Write Your Own

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Overall Quality


Review by OayxYT
Overall Quality

Best bang for your buck, hands down. Ordered this bike from a local bike shop and it is amazing. With reliable components, it is better than any full squish bikes in this price range. Although the wheels were bulkier than I expected, it was a good thing for the terrain I am riding. Thank you diamondback for this masterpiece.

(Posted on 12/21/2019)

Not as expected but still great

Review by Tinn
Overall Quality

I ordered the XL and the first thing I noticed was how big it really is. After seeing the carbon version of the bike in Seth'sBikeHacks videos I figured it would be a slack playful geometry bike, but upon arrival and assembly the frame was much more like a cross country bike with more fork offset and a short stem. My guess is that this is due to it being an XL but in the picture it shows the top tube and the top bar of the rear triangle (seat stay?) were in an almost straight line. On the XL its completely different and looks more like a cross country hardtail, I would include a picture but it's not an an option in the review. after throwing on a different stem that has some more rise than the stock one the feel of the bike is way better, I also installed a dropper post and I'm looking to install a different fork with more travel to help make it more progressive. with all that said the bike performs super well with the plus tires and SLX shifting is smooth but I had to adjust it some once assembled. unless you're 6'4"+ I would go with the large. I'm 6'1" and the XL is pretty big. overall a great bike but if I could go back I'd get a L.

(Posted on 11/29/2019)

This bike rips

Review by Alejandro
Overall Quality

My wife got this for my birthday after I'd been eyeing it for months. I got really hyped up about it after watching Seth and DailyMTBRider on YouTube. I was a little worried that it might not live up to the hype, but it definitely does. I have no problem keeping up with my FS friends, and always have a blast on this bike. It climbs well, is fairly light and well equipped for its price point. I did put a 150mm dropper on it and converted to tubeless - a 'must' for this bike. I have the 2018 model (purple one) and do sometimes wonder why the rear is boost and the front isn't. It may make things weird if I want to upgrade fork or wheels later on. Looks like they changed that in this new tan one. But for now I have no need to upgrade it, it feels like a much pricier bike and handles great, both up and down hills. I was also impressed with the stock pedals - most 'serious' bikes don't come with pedals, and decent ones are usually $50+ (like raceface Chester's) and the pedals this came with work great! I am quite pleased with this bike.

(Posted on 7/17/2019)

Have not bought it yet

Review by Drake
Overall Quality

My friend let me ride his and it peadald really smooth and jumped real nice

(Posted on 5/14/2019)

I’m in love!!!

Review by Rhodes
Overall Quality

Was sick of my full suspension bike and wanted to get back on a hardtail....this was the perfect choice! It’s great on rocky technical singletrack and a total blast on steep downhills....and it climbs so much better than a FS bike. The only thing I change on it was the saddle and I put 2.6 tubeless tires on it.

(Posted on 5/4/2019)

Fantastic bike

Review by Jake
Overall Quality

I spent months determining where to go to re-enter the mtb hobby. Decided on this bike, ordered it Friday. It arrived 3 days later, and after ~20 minutes of unpacking it was less than 10 minutes to bedding in the brakes and putting the first couple miles on to get a feel for my first non-rigid bike. The shifting is dialed, smooth and easy, the brakes feel nearly ideal and once my shock pump arrives I'll make sure to dial that too. This bike is everything I wanted, although I'm not a huge fan of the color or the Sync'r saddle, but I feel like that's more on the fact that I'm a fairly heavy set guy with very little butt to pad the seat, but since I'm putting a dropper on anyway, it won't make a huge difference really. Highly recommend this bike, but it's not internally routed like previous models.

(Posted on 2/4/2019)

great bike Great Fun

Review by eljaguar
Overall Quality

I purchased this bike a few weeks ago, and cant get enough time on the trail with the Sync'r. its an absolute fun bike to ride, for a hardtail this bike is super smooth on the trail. The components on this bike are great and best of all its has been designed to be upgrade friendly, the routing hole on the seat tube allows an internally routed dropper also comes with mounting for a bash guard. Overall this is a great Hardtail and i will enjoy this bike for as long as i own it.

(Posted on 1/30/2019)

Yes you should

Review by The research guy
Overall Quality

Haven't ridden it yet but I have been looking at almost every mtb for months and haven't found any bike with a better value

(Posted on 1/28/2019)

Sizing and customer service

Review by Grant
Overall Quality

So for warning I do not own the new sync'r, yet. I am planning on buying it in the up coming weeks. I just wanted to talk about how amazing the customer service team has been in answering my questions. Like any bike, this is a pretty big purchase. I want to make sure I get something durable that will last me a while. Along with my concerns were sizing, I’m a smaller 5’11 which Diamondback classifies as a Large. I’ve ridden the 2018 sync'r quite a bit in size medium and loved it. So I got ahold of customer service and got in touch with Leif, he gave me a big list of things to look at when debating on what size to go with. Im leaning toward a Medium frame size because I have relatively short legs and am fairly narrow. I think it will give me better reach to the pedals and also the ability to throw it around easier in the air. Can’t wait to get this thing and get out on the trails this year!

(Posted on 1/22/2019)