Sun Equalizer 31 26″ Disc Bicycle Wheel Set


At 500g, the Sun SOS is light weight for it’s width and strength.  500g for a rim that eats rock gardens for breakfast is hands down, one of the easiest decisions you’ll have to make when looking at ways to breathe new life in to your trusted steed.


The Sun-Ringle Equalizer rims proceeded a popular movie of the same name, in an adjunct way that may or may not have lent credit to this rim’s attempt at becoming a trail sensation a decade earlier.  It’s that good!  While such phenomenal success may have remained elusive, its not due for a lack of trying.  Sun-Ringle debuted a lineup of Equalizer rims, each seemingly more dedicated at solving the ultimate performance equation of ultimate balance than the next.  Sometimes things take a little while to develop, (try waiting until the 3:28sec mark), and for Sun it eventually came with their Helix TR rims, and then their contemporary Duroc rim series.  That’s pretty straight forward.

Ready for a radical miracle?  Just a walk in the park Cougar.

Sun Equalizer 31 26″ Clincher Specs

26″ Front Wheel Rear Wheel Wheel Weights (approx)
Rim Info  Sun Equalizer 31 26″ aluminum alloy clincher
ETRTO 559x23mm (26″)
Weight ≈550g, 26″
Sidewall Disc brake only
Inner Width 23mm
Outer Width 31.5mm
Rim Depth 19.5mm
Rim ERD 538 (26″)
Rim Tape Tesa Tubeless Rim Tape Installed ≈ 30 – 35g/wheel (varies based on overlap)
Washers single stainless eyelets N/A
Valve Type Schrader compatible
Tire Type Standard Clincher with inner tube
Tire Volumes 26″ x 1.75″ – 2.4″
Nipple Info (Brass) Sapim 12mm Brass Chrome Plated @ ≈ 1g ea 32H = 32
Spoke Info Leader Sapim Leader 2.0mm Stainless Spokes Black ≈ 6.5g ea 32H = 208
Spoke Count Front: 32H Rear: 32H
Spoke Pattern Front: 3 Cross (36H) Rear: 3 Cross (36H)
Lengths 29er 254/256mm (36H) 254/256 (326)
Hub Info (option) Shimano Deore Shimano Deore
Hub Weight 248g 428g 252g F, 465g R
Hub Shell Aluminum Alloy
Axle Info (option) QR 9mm x 100mm OLD QR 10mm x 135mm OLD
Hole Ct 32H 32H
DriveS PCD
61 61
DS Ctr to Flange 21.5 19.5
Non-DriveS PCD 61 61
NDS Ctr to Flange 33 32
Axle Material Steel Alloy
Bearings Loose Ball Bearings
Bearing Size 3/16″ x 10 1/4″ x 9
Freehub HG Shimano/Sram “Splined” MTB 8/9/10/11 Speed + Shimano/SRAM Road 8/9/10 speed
FH Material Steel Alloy

Wheel Weights

(without QR’s or rim tape)

Shimano Deore – Leader/Brass F ≈ 1065g R ≈ 1245g Set ≈ 2310g

What Others Are Saying…

The Sun Equalizer 31 is a stellar wheelset option, in a field that’s composed of some of the best aluminum alloy MTB rims ever.  Given their level of performance, they are an unbeatable deal, (coupon codes here).  We’re not joking around here.  If you don’t have a lot of time to research all the rim options in the marketplace, if you don’t have a lot of money, and if you can find this product page, maybe that’s Magic.

Should you buy this wheelset?  Entirely your call.  Should you watch this short but sweet rock climbing video?  Absolutely.  One More Fun One.

Make That Two.

Wheelset Facts

  • Comes with rim tape installed.
  • The Sun Equalizer 31 has an 23mm inner width, is 19.5mm tall, 31.5mm wide, and weighs about 550g (26″)
  • Recommended for use with 26″ x 1.75″ – 2.4″ tires
  • We do Not use internal washers with these rims, the rims are eyeletted.
  • Wheelset weight will vary with end caps, freehub driver, and nipple selection.  Rim Tape adds approximately 30-35g for the wheelset, on average.

Additional information

Weight 7 lbs
Dimensions 30 × 7 × 26 in


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