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2021 X-Large SKU: BMT21657

Diamondback Mason 2 Mountain Bike - 2021, X-Large

Regular price

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TPC Guarantee

Every bike receives our white glove, Certified Pre-Owned treatment, including a full pro-tune by our Master Mechanics in Louisville, CO. All CPO bikes are pristine and rolling beautifully before we pack and ship to your door.

- X-Fusion Manic dropper post for increased handling on the descents.

Master Mechanic's Notes
- Light scuff on rear derailleur.
- Light scuff on top tube & non drive side down tube.

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141-Point Inspection

This bike passed our 141-point inspection to qualify to be a Certified Pre-Owned bike. It's free of structural damage and is in excellent cosmetic shape.

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30-Day Hassle-Free Returns

Shop with confidence. Every bike is covered by our 30-day satisfaction guarantee. If this bike isn’t perfect for you, get in touch and we’ll help you find the right bike.

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RideFast Shipping

Assemble your bike in 15 minutes or less! Our bikes ship in our RideFast box for speed and safety. All tools you need to assemble are included.

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Year 2021
Brand Diamondback
Model Mason 2
Size X-Large
Frame Material Aluminum
Drivetrain SRAM, 1x11 spd
Weight 31 lbs 1 oz
Fork Rock Shox Judy Gold RL
Fork Travel 120mm
Rear Shock Travel N/A
Brakes SRAM Level T, Disc - Hydraulic
Shifters SRAM NX, Mechanical
Rear Derailleur SRAM NX
Bottom Bracket Shell Threaded
Crankset Race Face Aeffect Cinch Alloy, 28t, 175mm
Cassette SRAM PG-1130, 11-42t
Chain KMC
Handlebar Race Face Alloy, 790mm
Headset FSA Integrated
Stem Diamondback Alloy, 35.0mm x 65mm, 6°
Seatpost X-Fusion Manic, 30.9mm
Seatpost Travel 125mm
Saddle Ergon SM Sport
Front Axle Spacing 15x110mm (Thru-Axle)
Rear Axle Spacing 12x148mm Boost
Wheelset Diamondback Alex MD35 Aluminum Tubeless Ready , Alloy
Front Tire Vee Rubber T-Fatty Tubeless Ready , 27.5" x 2.8"
Rear Tire Vee Rubber T-Fatty Tubeless Ready , 27.5" x 2.8"
Tire Type Tubeless
Tubeless Compatibility Bike ships tubeless


Recommended Rider Height 6'1" - 6'4"
a. Effective Top Tube 640 mm
b. Seat Tube 560 mm
c. Seat Tube Angle 74°
d. Head Tube Angle 68°
e. Head Tube 140 mm
f. Stack 617 mm
g. Reach 463 mm
h. Standover Height 823 mm
i. Saddle Height Range 740 - 850 mm

“I love this company! My beautiful bike arrived promptly, was packed brilliantly, and tuned perfectly. It was exactly as described.”

— Kari K.


“In the past month, I purchased a road bike and MTB from TPC. Very happy with the price and condition of both bikes! I was riding the bikes 10 minutes after I received them.”

— David H.

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