Mason 1

star(s) from 2 reviews.

Availability: Out of stock

Rip the trail less traveled on the Mason 1, a hard-charging 27.5+ hardtail.
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Mason 1

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The Mason 1 is a hard-charging trail bike that plows through the rough stuff, yet remains fun and flickable. Plus-size tires add insane levels of traction and control without adding the weight of a rear suspension system. This hardtail gets the job done with sturdy double-wall wheels wrapped with 27.5x3.0-inch tires. An SR Suntour XCR 34 fork provides 120mm of travel to get you through the rough stuff, while Tektro Aries mechanical disc brakes keep your speed under control. The 1x10 Shimano drivetrain makes shifting simple, meaning no pesky front derailleur to fiddle with while you monster-truck over rocks and roots. Take the trail less traveled? Sure. And with the Mason 1 you’ll be ripping the trail less traveled.
Frame Mason 27.5" Plus 6061-T6 Weapons Grade Aluminum w/ Double Butted Formed Top Tube, Down Tube, Seatstays, Tapered Head Tube, ISCG-05 Tabs, 9mm Boost Dropouts, w/ Replaceable Hanger
Fork SR Suntour XCR34 27.5"+ Suspension Fork, 120mm Travel, Coil Spring, 6061 Forged Alloy Crown, Alloy Tapered Steerer Tube, 34mm Stanchions, 110x15mm Thru-axle
Headset FSA NO.57, Sealed Cartridge for Tapered Headtube
Cranks Alloy Arm w/ 30T Steel "Narrow Wide" Single Ring
Sprocket 30 Tooth Steel
Bottom Bracket Sealed Cartridge
Rear Derailleur Shimano Deore M6000 Shadow Plus, 10 Speed
Shifter Shimano Deore M6000, 10 Speed
Cogset Shimano HG500, 10 Speed, 11-42T
Chain KMC X10, 10 Speed
Front Hub 32h Alloy, Boost 110x15mm, w/ CNC Disc Mount
Rear Hub 32h Alloy, 10mm QR, Cassette w/ CNC Disc Mount, 141mm
Spokes 14g Stainless Steel
Rims Diamondback MD35 35mm Doublewall, 32h
Tires Vee Rubber Bulldozer, 27.5x3.0 Tires
Brakes Tektro Aries Mechanical Disc, w/ 180mm Front / 160mm Rear Rotors
Brake Levers Tektro 2 Finger Alloy Linear w/ Reach Adjust
Pedals DB4L Alloy w/ Molded Traction Pins
Handlebar DB35 Alloy, 760mm Wide, 15mm Rise, 35mm Bar Bore
Grips DB "Flanged" 135mm Silicone
Stem DB35 Alloy, 60mm, 35mm Bar Bore
Seat DB Race M-series Saddle
Seatpost DB Alloy Micro Adjust, 30.9mm
Extras Tool Kit
Type configurable
Bike Size SM 5'4" - 5'7" MD 5'7" - 5'10" LG 5'10" - 6'1" XL 6'1" - 6'4"
Seat Tube Length 420.0mm 460.0mm 510.0mm 560.0mm
Stand Over Height 727.0mm 752.0mm 788.0mm 823.0mm
Top Tube Length 590.0mm 605.0mm 625.0mm 640.0mm
Stack 590.0mm 590.0mm 604.0mm 617.0mm
Reach 421.0mm 435.0mm 451.0mm 462.0mm
Head Tube Length 110.0mm 110.0mm 125.0mm 140.0mm
Head Angle 68.0° 68.0° 68.0° 68.0°
Seat Angle 74.0° 74.0° 74.0° 74.0°
Wheel Base 1113.0mm 1131.0mm 1149.0mm 1168.0mm
Chain Stay Length 435.0mm 435.0mm 435.0mm 435.0mm
Fork Offset 51.0mm 51.0mm 51.0mm 51.0mm
BB Drop 55.0mm 55.0mm 55.0mm 55.0mm
Stem Length 60.0mm 60.0mm 60.0mm 60.0mm
Handlebar Width 760.0mm 760.0mm 760.0mm 760.0mm
Crank Length 170.0mm 175.0mm 175.0mm 175.0mm
Seat Post Length

Customer Reviews Write Your Own

You're reviewing: Mason 1

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Overall Quality

Great bike. Bombs down steep, flow-ey hills like a champ. Not sure about Diamondback's customer service though.

Review by L.B.
Overall Quality

There's such little information online about the 2019 model of the Mason 1 that I'd love to focus on the bike in this review to help out others interested in the Mason 1, but I'll be honest -- I'm only using the review to complain about Diamondback customer service at the moment (which I think is justified when reviewing a Diamondback product). Maybe I'll come back and give the bike the review it deserves later.

Two of my local bike shop mechanics noticed some weirdness with my rear wheel (there's a joint in my (stock Diamondback brand) rear wheel rim that they said isn't sealed correctly and that it suggests there could be structural deficiencies) and said it could be dangerous to continue riding. They recommended I contact Diamondback and don't ride again until I get a replacement rear wheel.

I submitted a warranty claim to Diamondback a week ago and still haven't heard back from them -- I don't know whether it's unsafe for me to ride on the faulty wheel or not, or whether I qualify for a free replacement wheel or not. Meanwhile, my new Mason 1 is sitting in my garage, unridden, in the first week of what could likely end up being up to a month of no riding.

You would think a structurally compromised stock Diamondback wheel -- something that could easily break while on the trail and send the rider head over heels -- would be something that Diamondback sees as an important issue to resolve quickly.

2 stars: because the bike is pretty sweet for the price, but you might be riding on unsafe parts without knowing it.

(Posted on 6/3/2019)

Im not sure what is better, the bike or the customer service

Review by John
Overall Quality

I originally ordered a Large frame mason 1 and was impressed with how fast it shipped to me. I took it for a ride to see how it handled and everything was spot on except it was slightly too big for me at 5'10". I called the customer service team to ask if I would be able to get a medium frame instead. Diamondback doesn't do exchanges but I was able to return the large bike and place a separate order for a medium one. I was worried that I had lost money because the bike was no longer on sale the second time I bought it but they told me not to worry because they would do a partial refund to let me buy the new bike at the price of the old one. All of this occurred within the span of a week so I am very impressed at the speed in which they help their customers.
As for the bike itself, It was exactly what I was looking for. I am getting back into mountain biking and I was looking for the best bike I could find for a low budget and the mason 1 hit the mark. This bike's 27.5 plus tires allow for great traction which helps a lot with a hardtail. the forks work great for any beginner to intermediate trails but can easily be upgraded to air forks as you get better and tackle tougher trails. the 1 x 10 drivetrain is perfect for trails as the controls are simple and I didn't feel like I needed any more gears. The mechanical brakes weren't a minus for me as I was easily able to one finger brake and a mechanical system is easier to maintain than a hydraulic one.
I highly recommend this bike to anyone looking for an entry level hardtail that can handle whatever trail you can.

(Posted on 5/9/2019)