RaceFace Arc 27 Custom Bicycle Wheel Set

The RaceFace ARC 27’s (formerly Easton) is a Rad rim proposition for anyone looking to build their own set of MTB wheels.  When Easton, (now RaceFace) introduced their Arc rims several years ago, they immediately shook things up.  Arc rims are easy to understand, they are competitive in terms of weight and price, are easy to build with, and they hold up. Like all Arc rims, the Arc 27 offers a lot of width, for not a lot of weight.  Consider that 26″ disc rims for all mountain riding, with a 21mm inner width, used to weigh in at 500 – 575g only a few years ago.  The Arc 27’s with a 27mm tubeless ready inner width, in a larger/29er diameter, weigh in at 502g, (our scale).  That’s a radical miracle.  Arc 27 rims are tough.  They’re not going to flex while you’re trying to bomb through a rough patch, or fight you in a tight turn.  It’s a quality rim, offering wheel stiffness without the harsh ride of some carbon options.  Given this rim’s width and strength, it’s an ideal choice for a pretty broad range of riding types.  But it’s definitely an excellent option for larger volume, lower pressure set ups.  If you need traction and you know it, we’d recommend building up a set of these, messing around with your tire pressures to see how low you can go, and you might be able to set new time records for your favorite trail sections, even before you mess around with your shock settings. RaceFace Arc 27 Tubeless Ready Clincher Specs 700c Front Wheel Rear Wheel Wheel Weights (approx) Rim Info Easton Arc 24 welded aluminum alloy clincher, tubeless ready ETRTO 622x27mm (29er) Weight ≈502g average, 29er Sidewall N/A Inner Width 27mm Outer Width 31mm Rim Depth 20mm Rim ERD 604 (29er) (without washers) Rim Tape Tesa Tubeless Rim Tape Installed ≈ 30 – 35g/wheel (varies based on overlap) Washers Built with 3D internal stainless steel washers ≈4g F, ≈4g R Valve Type Presta Tire Type Standard Clincher with inner tube OR MTB Tubeless Tire Volumes 29er x 2.2″ – 2.6″ Nipple Info (Brass) Sapim 12mm Brass Chrome Plated @ ≈ 1g ea 32H = 32 Nipple Info (Alloy) Sapim Alloy Double Square Polyax @ ≈ .34g ea 32H = 10 Spoke Info Leader Sapim Leader 2.0mm Stainless Spokes Black ≈ 6.5g ea 32H = 208 Spoke Info Race Sapim Race 2.0/1.8/2.0 Butted Stainless Spokes Black ≈ 5.65g ea 32H = 180 Spoke Info Dlight Sapim D-Light TCS 2.0/1.65/2.0 Butted Stainless Spokes Black ≈ 5.16g ea 32H = 165g Spoke Count Front: 32H Rear: 32H Spoke Pattern Front: 3 Cross Rear: 3 Cross (32H) Lengths 29er 292/294mm (32H) 291/294 (32H) Hub Info (option) ST160 ST280 Hub Weight 152g 280g 152g F, 280g R Hub Shell Aluminum Alloy Axle Info (option) QR 9mm x 100mm OLD QR 10mm x 135mm OLD Hole Ct 32H 32H DriveS PCD 42 61 DS Ctr to Flange 35.5 18 Non-DriveS PCD 42 44 NDS Ctr to Flange 21.5 32 Axle Material Aluminum Alloy Bearings Sealed Cartridge Japan EZO Bearings Bearing Size MR17287LLB MR17287LLB Freehub HG Shimano/Sram “Splined” MTB 8/9/10/11 Speed + Shimano/SRAM Road 8/9/10 speed Freehub Road 11 Shimano/SRAM Road 11 speed Freehub MicroSpline Shimano MTB 12 speed Freehub Sram XD Sram XD 1×11 + 1×12 Freehub Sram XDR Sram XDR 1×12 FH Material Aluminum Alloy End Caps: Quick Release Front 9mm x 100mm / Quick Release Rear 10mm x 135mm Thru-Axle Front 15mm x 100mm / Thru-Axle Rear 12mm x 142mm **Boost Front 15mm x 110mm / **Boost Rear 12mm x 148mm **Lefty Front Hub Wheel Weights (without QR’s or rim tape) 29er ST160/280 – Race w/ Brass F ≈ 879g R ≈ 999g Set ≈ 1878g 29er ST160/280 – Dlight w/ Alloy F ≈ 832g R ≈ 952g Set ≈ 1784g 29er DT350 – Race w/ Brass F ≈ 884g R ≈ 1019g Set ≈ 1903g 29er DT350 – Dlight w/ Alloy F ≈ 837g R ≈ 972g Set ≈ 1809g What Others Are Saying… You have the choice to build these wheels with ST160/ST280 MTB hubs or go all out with DT Swiss 350 disc hubs featuring the DT Swiss Star Ratchet engagement mechanism.  Both are great options.  The Speed Tuned Super 6 2.0 hubs feature 36 points of engagement, (10 degrees) via a 4×2 pawl freehub.  The drive ring and pawls are overbuilt in terms of diameter, (drive ring), height, (drive ring + pawls), and materials, (quality stainless).  Their bearing placement is proper, in terms of overall design meant to promote hub function and durability. DT Swiss 350 hubs are excellent, they are finished to incredible standards, and include DT Swiss’ Star Ratchet engagement system, (same exact drive mechanism as with their DT 240’s and 180’s).  These hubs get the job done, hold up extremely well in an assortment of conditions, and have proven reliable even in the emerging context of high torque drive trains, (29er wheel bikes with 1×12 Eagle drive trains).  Essentially, DT 350’s offer you the option of buying one of the best-performing hubs available anywhere, for only a modest price bump.  Given their huge value proposition, they are hands down a great option for any MTB rider that cares about their gear. In “stock” form, these wheels are built with Sapim Race Double Butted 2.0/1.8/2.0 black spokes in a 32 hole, three cross configuration front, and rear.  Sapim Race spokes offer legendary quality and performance.  If you didn’t know a thing about spokes, know that your wheels would come with a really top-notch spoke product.  That being said, we’re offering a spoke upgrade option, in the form of Sapim DLight 2.0/1.65/2.0 spokes.  There are two great spoke manufacturers in the world, DT Swiss and Sapim, (in alphabetical order).  Essentially, you might be able to find a spoke product that approaches their quality, but you’d be hard-pressed to find a company that makes a better spoke product than these two.  All their spoke products, from straight gauge to their elliptically bladed and butted products, are all the best of the best.  Sapim Dlight spokes will perform at the same relative level as Sapim Race or DT Competition spokes but will shave off approximately 75 – 80g from the wheelset. The Easton Arc 27 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 tubeless tape & valves installed. The RaceFace (formerly Easton) Arc 27 (welded joint), has a 27mm inner width, is 20mm tall, 31mm wide, and weighs about 502g (29er) Recommended for use with 29er x 2.2″ – 2.6″ tires These wheels are built with internal stainless steel washers. Wheelset weight will vary with end caps, freehub driver, and nipple selection.  Tape + Valves adds approximately 35g for the wheelset, on average.