Purpose Built for XC and Gravel Endeavors

The ultimate carbon fiber racing wheelset

M Series 50 Fifty

Carbon Fiber Wheelset

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The ultimate carbon fiber cross-country and marathon wheelset.

M Series 50 Fifty

What It Is
Who It's For
Why We Made It
Media Reviews
Full Details

The ultimate carbon fiber cross-country and marathon wheelset.

Mountain bikers who ride short-travel bikes, low-volume tires, and long distances.

Because cross-country riding and racing is most fun when your equipment allows you to ride how and what you want to. We believe the best cross-country wheelset should inspire confidence regardless of the terrain or race course. As such, the M50 is equally adept descending as it is ascending. The M50 is light, but not at the expense of strength; stiff but not to the detriment of comfort.

“Racing the World Cup is demanding on wheels and the M50 has exceeded all expectations. If a product is wrong I hear about it, but my racers don’t talk about the M50s because they just perform.”

– Cannondale Factory Racing

“Once again I’’ll say that there really are no better mountain wheels on the market right now than the M-Series, and I’’ve tried a lot of them.”

Outside Online

The ENVE M50 Fifty is a fast, cross-country specific carbon fiber mountain bike rim that plays host to new ENVE technologies and promises a ride experience second to none for XC riding and racing on hard-tails and short-travel suspension mountain bikes.

The ENVE M50 Fifty features ENVE’s patented molded spoke hole technology that allows for much better strength to weight ratio than other rims, as the carbon fibers are not drilled (and subsequently broken) to accommodate spokes. Given that the typical XC racer chooses a 29″ hardtail or short-travel suspension bike as their bike of choice the ENVE M50 features a full unidirectional carbon fiber construction and laminate design that provides more dampening and comfort for long hours spent in the saddle racing and training.

Further, at ENVE we use a removable bladder system and never uses paint or filler on our carbon rims. The result is a weight savings of approximately 120g per wheelset. Because cross-country racers and riders need equal performance on the climb and on the descent, the M50 Fifty is both lightweight and stiff, but strong and durable for uncompromising downhill performance.

The M50 is tubeless compatible and features a hookless design for superior tubeless performance. The ENVE M50 is proudly manufactured in the USA.

Product Specs

Rim Specs Front Rear
Depth 28mm 28mm
External Rim Width 27mm 27mm
Internal Rim Width 21mm 21mm
Hole Count 28 28
ERD (Effective Rim Diameter) 601mm 601mm
Recommended Tire Size 1.9 in - 2.25 in 1.9 in - 2.25 in
27.5" Specs Front Rear Wheelset
Rim Specs 353g 353g 706g
Chris King 6B 670g 862g 1532g
DT 240 6B 665g 740g 1405g
DT 240 CL 634g 728g 1362g
29" Specs Front Rear Wheelset
Rim Specs 365g 365g 730g
Chris King 6B 690g 882g 1572g
DT 240 6B 685g 760g 1445g
DT 240 CL 654g 748g 1402g

M Series Pressure Recommendations

Rim Model M50 M60 M60 HV M60 Plus M70 M70 HV M90
Tire Volume 1.8-2.1 2.1-2.25 2.3-2.4 2.8-3.25 2.3-2.4 2.4-2.5 2.35-2.5
< 120 lbs. FR 20-2422-26 18-2219-23 16-2017-21 12-1314-15 16-2017-21 15-1916-20 20-2422-26
120-140 lbs FR 20-2422-26 18-2219-23 16-2017-21 13-1415-16 16-2017-21 15-1916-20 20-2422-26
140-160 lbs FR 22-2623-27 19-2320-24 17-2118-22 14-1516-17 17-2118-22 16-2017-21 23-2724-28
160-180 lbs FR 22-2624-28 20-2421-25 18-2219-23 15-1617-18 18-2219-23 17-2118-22 24-2825-29
180-200 lbs FR 24-2825-29 21-2522-26 19-2320-24 16-1718-19 19-2320-24 18-2219-23 25-2926-30
200-220 lbs FR 25-2926-30 23-2724-28 21-2522-26 17-1819-20 21-2522-26 20-2421-25 28-3229-33
220-240 lbs FR 26-3028-32 25-2926-30 23-2724-28 18-1920-21 23-2724-28 22-2623-27 29-3330-34


Tubeless Optimized


Width Optimized


Application Optimized



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M Series 50 Fifty

Carbon Fiber Wheelset

Starting at:
Please complete configuration to see price.
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Front / Rear
Rim Depth:
External Rim Width:
Internal Rim Width:
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Recommended Tire Size:

Rim Size

Rim Volume - Each M Series rim is optimized for specific tire volumes. Your preferred tire size should guide your decision between standard and high volume M Series wheels

  • M60 – 2.1 – 2.25" Tire Width
  • M60 HV – 2.3 – 2.4" Tire Width
  • M70 – 2.3-2.4" Tire Width
  • M70 HV – 2.4 – 2.5" Tire Width

29 Inch Wheels

  • Best speed holding
  • Best traction
  • Smoothest rolling over rough terrain and obstacles
  • Good lateral stiffness
  • Slowest accelerating
  • Best for hard tails and short travel suspension bikes

27.5 Inch Wheels

  • Best features of 29 inch and 26 inch wheels
  • Smoother than 26 inch over rough terrain and obstacles
  • Quicker acceleration than 29 inch wheels
  • Better traction than 26 inch wheels
  • Agility and handling on par with that of a 26 inch wheel
  • Best for medium to long travel suspension bikes

Spoke Count

28 Hole

  • Slightly lighter wheel build
  • Best for lighter riders
  • No difference in durability

32 Hole

  • Slightly heavier wheel build
  • Increased stiffness
  • Best for heavier or more aggressive riders

Front Axle

ENVE supports standard 100mm and boost 110mm front wheel 15mm thru-axle systems on all wheels except the M90 which uses a 20mm front axle. We can convert thru-axles to accommodate quick releases if your fork requires the use of a quick release. Front axle specifications are provided by your fork manufacturer.

Standard = 15mm x 100mm Thru-axle
Boost = 15mm x 110mm Thru-Axle

Rear Axle

Rear axle configuration is determined by your frame. You can find most in the specs section of the manufacturer website.

The most common current rear axle configuration for all-mountain bikes.
This is boost. Frames 2015 model year and newer will most likely have a "boost" rear axle configuration.
Common rear axle on DH bikes model year 2013 and older.
Most common rear axle configuration on model year 2014 and newer DH bikes.


Shimano/SRAM 10
All Shimano 10/11 speed and SRAM 10 speed component groups
All SRAM 1x11

Hub Model

DT 180 CL
DT Swiss' lightest hub with centerlock brake rotor style
DT 240 6B
DT Swiss' most popular hub with 6 bolt brake rotor style
DT 240 CL
DT Swiss' most popular hub with centerlock brake rotor style
DT 350 6B
DT Swiss' most affordable hub with 6 bolt brake rotor style
DT 350 CL
DT Swiss' most affordable hub with centerlock brake rotor style
Chris King 6B
Chris King hub with 6 bolt brake rotor style

Note: DT 180 only comes standard with a center lock brake style. Chris King only comes standard with a 6 bolt style. We can convert both of these to accommodate any build. Just call us.

Decal Colors

M Series 50 Fifty

Carbon Fiber Wheelset

Demo this Wheelset

Demo this Wheelset

Ride them and you'll know
Step 1
ENVE Customer Service will contact you to give a brief wheel specification consultation.
Step 2
ENVE will deliver your demo wheelset within 3 business days.
Step 3
Upon receipt you will have 14 days to demo your wheelset.
Step 4
Upon completion of 14 day demo period, repackage and return wheelset to ENVE using provided return shipping label.
Step 5
Purchase within 60 days and demo fee will be credited back to you.

Demo Start Date

Rim Size

Rotor Size

Front Axle

Rear Axle


Demo Cost
  • Includes shipping to and from ENVE
  • Wheelset delivered complete & ready to ride
    (Includes: Installed Tires, Rotors, Cassete & Emergency Repair Kit)

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