M640

Carbon Fiber Wheelset

SKU# -
Starting at:
$
Please complete configuration to see price.

The definitive mountain wheel. The M6 Series defines the modern, and varied interpretation of the mountain bike. Loaded with traction and acceleration on the climb it’s also backed with precision and control while absorbing vibrations and impacts on the descent. The M6 Series is designed in 2 diameters and 3 widths to ensure your sophisticated preference for tire size and pressure is met with an uncompromising tire to rim interface.

M640

What it is
Who it's for
Why we made it
What's included

The definitive mountain wheel. The M6 Series defines the modern, and varied interpretation of the mountain bike. Loaded with traction and acceleration on the climb it’s also backed with precision and control while absorbing vibrations and impacts on the descent. The M6 Series is designed in 2 diameters and 3 widths to ensure your sophisticated preference for tire size and pressure is met with an uncompromising tire to rim interface.

The mountain biker who wonders what is possible, the skeptic afraid of ‘plastic’ wheels, the weight weenie, the Clydesdale, the high mileage guy, the weekend warrior. It would be easier to describe who it is not for…

ENVE showed the world that a mountain bike wheel could be carbon – we’re still immensely proud of that achievement. A mountain bike wheel, however, can be so much more.  The M6 Series is not about technical challenges, and we refuse to chase specifications in order to be the widest, tallest, or stiffest. For the M6 Series of wheels, the question was not about carbon, rather, “What is the potential of a mountain bike wheel?”

Each M6 Series wheel model is designed for the broad range of tire widths, hub configurations, and sizes so that – you – the modern trail rider, can choose between them.

-Tubeless Kit
-Accessory Bag
-Wheel Manual
-Wheelbuild Card

Product Specs

Rim Specs Front Rear
Rim Depth 25mm 25mm
External Width 49mm 49mm
Internal Width 40mm 40mm
Hole Count 28 28
Effective Rim Diameter 27.5" 571mm
29" 608mm
27.5" 571mm
29" 608mm
Recommended Tire Size 2.8 in - 3.2 in 2.8 in - 3.2 in
27.5" Specs Front Rear Wheelset
Rim Weight 457g 457g 913g
i9 Hydra CL 736g 869g 1604g
Chris King ISO 6B 764g 934g 1697g
i9 101 CL 786g 930g 1716g
29" Specs Front Rear Wheelset
Rim Weight 495g 495g 989g
i9 Hydra CL 778g 911g 1689g
Chris King ISO 6B 809g 979g 1789g
i9 101 CL 838g 982g 1821g
Spoke Information* Spoke Cross Front Length (NDS/DS) Rear Length (NDS/DS)
DT240 27.5" 6B non-Boost 2X 268mm / 270mm 270mm / 268mm
DT240 27.5" 6B Boost 2X 268mm / 274mm 270mm / 270mm
DT240 27.5" CL non-Boost 2X 272mm / 274mm 272mm / 270mm
DT240 27.5" CL Boost 2X 272mm / 274mm 274mm / 272mm
Chris King 27.5" non-Boost 2X 268mm / 270mm 270mm / 268mm
Chris King 27.5" Boost 2X 268mm / 268mm 270mm / 268mm
DT240 29" 6B non-Boost 2X 286mm / 288mm 286mm / 288mm
DT240 29" 6B Boost 2X 286mm / 292mm 288mm / 288mm
DT240 29" CL non-Boost 2X 290mm / 292mm 290mm / 288mm
DT240 29" CL Boost 2X 290mm / 292mm 290mm / 288mm
Chris King 29" non-Boost 2X 288mm / 288mm 288mm / 286mm
Chris King 29" Boost 2X 286mm / 286mm 288mm / 286mm
i9 Hydra Boost CL - 27.5" 2X 272mm / 276mm 272mm / 268mm
i9 Hydra Boost CL - 29" 2X 290mm / 294mm 292mm / 286mm
i9 Hydra 6B Superboost - 27.5" 2X 268mm / 274mm 270mm / 268mm
i9 Hydra 6B Superboost - 29" 2X 286mm / 292mm 288mm / 286mm
i9 101 CL Boost - 27.5" 2X 272mm / 276mm 274mm / 268mm
i9 101 CL Boost - 29" 2X 290mm / 294mm 292mm / 286mm
*This wheelset is built with Sapim CX Ray spokes, except 101 builds, which use Sapim Force spokes. Those built before May 2018 may use a DT Swiss spoke equivalent. DT Swiss spoke heads are stamped "DT".

Pressure Recommendations

ENVE Model M525 M630 & M730 M635 & M735 M735 E M640 M930 M685
Application XC Trail Wide Trail E-MTB Trail+ DH/Gravity FAT/Snow
Inner Rim Width 25 30 35 35 40 30 85
Tire Size 2.1 2.25 2.4 2.35 2.4 2.5 2.5 2.6 2.8 2.5 2.6 2.8 2.8 3 2.35 2.4 2.5 3.8 4.5 5
< 120 lbs. / 54Kg F R 17-20 18-21 16-19 17-20 15-18 16-19 16-19 16-20 15-19 16-19 15-18 15-19 14-17 15-18 14-17 15-18 13-16 14-17 16-18 17-19 15-18 16-19 14-17 15-18 12-13 13-15 11-12 13-14 21-25 22-26 21-24 22-25 20-24 21-25 3 3 2.5 2.5 1.5 1.5
120-140 lbs. / 54-64 Kg F R 18-21 18-22 17-20 17-21 16-19 16-20 16-20 17-20 16-19 17-20 15-19 16-19 15-18 16-19 14-17 15-18 14-16 14-17 16-19 17-20 16-18 17-19 15-17 16-18 12-13 14-15 11-12 13-14 22-26 23-27 22-25 22-26 21-24 22-25 4 4 3.5 3.5 2.5 2.5
140-160 lbs./ 64-73 Kg F R 18-22 19-23 17-21 18-22 16-20 17-21 17-20 18-21 17-20 17-21 16-19 17-20 16-18 17-20 15-18 16-19 14-17 15-18 17-20 18-21 16-19 17-20 15-18 16-19 13-14 15-16 12-13 14-15 23-27 24-28 23-26 24-27 22-25 23-27 5 5 4.5 4.5 3.5 3.5
160-180 lbs./ 73-82 Kg F R 19-23 20-24 18-22 19-23 17-21 18-22 18-22 19-23 18-21 18-22 17-21 18-21 16-20 17-21 16-19 17-20 15-18 16-19 18-21 19-22 17-20 18-21 16-19 17-20 13-14 15-17 13-14 15-16 24-28 25-29 24-28 25-29 23-27 24-28 6 6 5.5 5.5 4.5 4.5
180-200 lbs./ 82-91 Kg F R 21-25 21-26 19-24 20-25 18-22 19-23 19-23 20-24 19-23 19-24 18-22 19-23 17-21 19-22 17-20 18-21 16-19 17-20 19-22 20-24 18-21 20-23 17-20 18-22 14-15 16-18 13-15 16-17 26-30 27-31 25-30 26-31 25-29 26-30 7 7 6.5 6.5 5.5 5.5
200-220 lbs./ 91-100 Kg F R 22-27 23-28 21-25 22-26 20-24 21-25 20-25 21-26 20-24 21-26 19-23 20-24 19-22 20-24 18-22 19-23 17-20 18-22 20-24 22-25 20-23 21-24 19-22 20-23 15-16 18-19 14-16 17-18 28-32 29-34 27-32 28-33 26-31 27-32 8 8 7.5 7.5 6.5 6.5
220-240 lbs./ 100-108 Kg F R 24-29 25-30 22-27 23-28 21-26 22-27 22-27 23-28 22-26 22-27 21-25 22-26 20-24 21-25 20-23 21-25 18-22 20-23 22-26 23-27 21-25 23-26 20-23 21-25 16-18 19-20 16-17 18-19 30-35 31-36 29-34 30-36 28-33 29-34 9 9 8.5 8.5 7.5 7.5

For high-traction trail conditions, the upper end of our recommended pressures may not be sufficient. Therefore, we recommend that you increase your tire pressure 5-10% at a time until you find your optimal tire pressure. Examples of high traction conditions would include loam, sandstone/slickrock, tacky flow trails, etc…

If running tires with double ply, triple ply, or DH casings, consider testing the lower range of the recommended tire pressures and move up or down from there until you’ve found your optimal tire pressure.

ENVE Model M525 M630 & M730 M635 & M735 M735 E M640 M930 M685
Application XC Trail Wide Trail E-MTB Trail+ DH/Gravity FAT/Snow
Inner Rim Width 25 30 35 35 40 30 85
Tire Size 2.1 2.25 2.4 2.35 2.4 2.5 2.5 2.6 2.8 2.5 2.6 2.8 2.8 3 2.35 2.4 2.5 3.8 4.5 5
< 120 lbs. / 54Kg F R 1.17-1.37 1.24-1.44 1.10-1.31 1.17-1.37 1.03-1.24 1.10-1.31 1.10-1.31 1.10-1.37 1.03-1.31 1.10-1.31 1.03-1.24 1.03-1.31 0.96-1.17 1.03-1.24 0.96-1.17 1.03-1.24 0.89-1.10 0.96-1.17 1.10-1.24 1.17-1.31 1.03-1.24 1.10-1.31 0.96-1.17 1.03-1.24 0.82-0.89 0.89-1.03 0.75-0.82 0.89-0.96 1.44-1.79 1.51-1.80 1.44-1.65 1.51-1.79 1.37-1.65 1.44-1.72 0.2 0.2 0.15 0.15 0.1 0.1
120-140 lbs. / 54-64 Kg F R 1.24-1.44 1.24-1.51 1.17-1.37 1.17-1.44 1.10-1.31 1.10-1.37 1.10-1.37 1.17-1.37 1.10-1.31 1.17-1.37 1.03-1.31 1.10-1.31 1.03-1.24 1.10-1.31 0.96-1.17 1.03-1.24 0.96-1.10 0.96-1.17 1.10-1.31 1.17-1.37 1.10-1.24 1.17-1.31 1.03-1.17 1.10-1.24 0.82-0.89 0.96-1.03 0.75-0.82 0.89-0.96 1.51-1.80 1.58-1.86 1.51-1.79 1.51-1.80 1.44-1.65 1.51-1.79 0.25 0.25 0.25 0.25 0.15 0.15
140-160 lbs./ 64-73 Kg F R 1.24-1.51 1.31-1.58 1.17-1.44 1.24-1.51 1.10-1.37 1.17-1.44 1.17-1.37 1.24-1.44 1.17-1.37 1.17-1.44 1.10-1.31 1.17-1.37 1.10-1.24 1.17-1.37 1.03-1.24 1.10-1.31 0.96-1.17 1.03-1.24 1.17-1.37 1.24-1.44 1.10-1.31 1.17-1.37 1.03-1.24 1.10-1.31 0.89-0.96 1.03-1.10 0.82-0.89 0.96-1.03 1.58-1.86 1.65-1.93 1.58-1.80 1.65-1.86 1.51-1.79 1.58-1.86 0.35 0.35 0.3 0.3 0.25 0.25
160-180 lbs./ 73-82 Kg F R 1.31-1.58 1.37-1.65 1.24-1.51 1.31-1.58 1.17-1.44 1.24-1.51 1.24-1.51 1.31-1.58 1.24-1.44 1.24-1.51 1.17-1.44 1.24-1.44 1.10-1.37 1.17-1.44 1.10-1.31 1.17-1.37 1.03-1.24 1.10-1.31 1.24-1.44 1.31-1.51 1.17-1.37 1.24-1.44 1.10-1.31 1.17-1.37 0.89-0.96 1.03-1.17 0.89-0.96 1.03-1.10 1.65-1.93 1.79-1.99 1.65-1.93 1.79-1.99 1.58-1.86 1.65-1.93 0.4 0.4 0.4 0.4 0.3 0.3
180-200 lbs./ 82-91 Kg F R 1.44-1.79 1.44-1.80 1.31-1.65 1.37-1.79 1.24-1.51 1.31-1.58 1.31-1.58 1.17-1.65 1.31-1.58 1.31-1.65 1.24-1.51 1.31-1.58 1.17-1.44 1.31-1.51 1.17-1.37 1.24-1.44 1.10-1.31 1.17-1.37 1.31-1.51 1.37-1.65 1.24-1.44 1.37-1.58 1.17-1.37 1.24-1.51 0.89-1.03 1.10-1.24 0.89-1.03 1.10-1.17 1.80-2.06 1.86-2.13 1.79-2.06 1.80-2.13 1.79-1.99 1.80-2.06 0.5 0.5 0.45 0.45 0.4 0.4
200-220 lbs./ 91-100 Kg F R 1.51-1.86 1.58-1.93 1.44-1.79 1.51-1.80 1.37-1.65 1.44-1.79 1.17-1.79 1.44-1.80 1.17-1.65 1.44-1.79 1.31-1.58 1.37-1.65 1.31-1.51 1.37-1.65 1.24-1.51 1.31-1.58 1.17-1.37 1.24-1.51 1.37-1.65 1.51-1.79 1.37-1.58 1.44-1.65 1.31-1.51 1.37-1.58 1.03-1.10 1.17-1.31 0.96-1.10 1.17-1.24 1.93-2.20 1.99-2.34 1.86-2.20 1.93-2.27 1.80-2.13 1.86-2.20 0.55 0.55 0.55 0.55 0.45 0.45
220-240 lbs./ 100-108 Kg F R 1.65-1.99 1.79-2.06 1.51-1.86 1.58-1.93 1.44-1.80 1.51-1.86 1.51-1.86 1.58-1.93 1.51-1.80 1.51-1.86 1.44-1.79 1.51-1.80 1.37-1.65 1.44-1.79 1.37-1.58 1.44-1.79 1.24-1.51 1.37-1.58 1.51-1.80 1.58-1.86 1.44-1.79 1.58-1.80 1.37-1.58 1.44-1.79 1.10-1.24 1.24-1.37 1.10-1.17 1.24-1.31 2.06-2.41 2.13-2.48 1.99-2.34 2.06-2.48 1.93-2.27 1.99-2.34 0.62 0.62 0.60 0.60 0.55 0.55

For high-traction trail conditions, the upper end of our recommended pressures may not be sufficient. Therefore, we recommend that you increase your tire pressure 5-10% at a time until you find your optimal tire pressure. Examples of high traction conditions would include loam, sandstone/slickrock, tacky flow trails, etc…

If running tires with double ply, triple ply, or DH casings, consider testing the lower range of the recommended tire pressures and move up or down from there until you’ve found your optimal tire pressure.

Technology

Application Specific Design

Explore

Hole Count

Explore

Full Carbon Laminate

Explore

Wide Hookless Beads

Explore

Resources + Support

M5 & M6 Series Tubeless Installation Guide

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Decal M640

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M640

Carbon Fiber Wheelset

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$
Please complete configuration to see price.
Add to Cart

Rim Size

29 Inch Wheels

  • Best speed holding and traction
  • Smoothest rolling over rough terrain and obstacles
  • Slowest accelerating

27.5 Inch Wheels

  • Quicker acceleration than 29 inch wheels
  • More agility and quicker handling

Rim Volume

  • M525 – 2.1-2.4" Tire Width
  • M630 – 2.3-2.5" Tire Width
  • M635 – 2.5-2.8" Tire Width
  • M640 – 2.8-3.2" Tire Width
  • M730 – 2.3-2.5" Tire Width
  • M735 – 2.5-2.8" Tire Width
  • M930 – 2.35-2.6" Tire Width

Spoke Count

24 Hole

  • M525 Specific

28 Hole

  • M6 Series Specific

32 Hole

  • M7 and M9 Series Specific

Front Axle

ENVE supports Boost 110mm and non-Boost 100mm fork spacing using 15mm thru-axle systems on all wheels (except the M930 which uses a 20mm front axle). Front axle specifications are provided by your fork manufacturer.

Boost = 15mm x 110mm Thru-axle
Standard = 15mm x 100mm Thru-Axle
20 X 110 = DH spacing: 20mm x 110mm Thru-Axle
20 X 110 Boost = New DH spacing: 20mm x 110mm Thru-Axle with wider flange and disc spacing

Rear Axle

Rear axle configuration is determined by your frame. Check with your frame manufacturer to determine your bike’s rear axle spacing.

12x148
Boost.Most frames ~2015 model year and newer will likely have a "boost" rear axle configuration.
12x142
Non-boostMost bikes older than ~2015 model year use non-boost spacing.
12x157
Modern DH Spacing or SuperboostThe most common rear axle configuration on model year 2014 and newer DH bikes. Also refers to Superboost, a wider version of Boost found on some newer frames.

Freehub

Shimano/SRAM 10
Shimano 10/11 speed, SRAM 10/11 and SX/NX 12 speed
XD
SRAM 1x12: GX, XO1 and XX1 Eagle (not SX/NX)
Microspline
Shimano 1x12: SLX, XT, XTR

Hub Model

Chris King 6B

  • Chris King hub with 6 bolt brake rotor style

Industry Nine Hydra

  • The quickest engagement and lightest weight hub from i9

Industry Nine 101

  • I9 Quality, made in the USA, at an affordable price
    All 101 builds use Sapim Force spokes

Decal Colors

M640

Carbon Fiber Wheelset

$250.00
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

Freehub

Demo Cost
$250.00
  • Includes shipping to and from ENVE
  • Wheelset delivered complete & ready to ride
    (Includes: Installed Tires, Rotors, Cassete & Emergency Repair Kit)

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