Synthesis DH Carbon is the downhill rim from Crankbrothers' tuned wheel system. Front and rear rims each get their own design, so the front wheel stays compliant for handling, grip and control in turns, while the rear supports peak loads and tracks straight at speed.

Highlights

  • Front- and rear-specific carbon rims for downhill
  • 31.5mm inner width and 39.5mm outer width, front and rear
  • Tubeless ready
  • 28 spoke holes on front rims, 32 on rear rims
  • 27.5in and 29in options
  • Crankbrothers lifetime warranty on Synthesis carbon rims

Tuned for downhill

Crankbrothers builds Synthesis front and rear rims with their own rim profiles, carbon layups and spoke counts, putting compliance and stiffness where each is rewarded best. Up front that means a compliant rim that improves handling and grip in turns; at the rear, a stiffer rim that supports peak loads and adds stability at speed.

Sizes & options

Each option is a single rim for one position. Hole count and weight depend on position and wheel size.

OptionPositionWheel size (ETRTO)Spoke holesERDWeight
27.5in Front 28HFront27.5in (584mm)28563mm515g
29in Front 28HFront29in (622mm)28603mm550g
27.5in Rear 32HRear27.5in (584mm)32563mm555g
29in Rear 32HRear29in (622mm)32603mm590g

Compatibility & fit

This is a rim only. It is not laced, and the hub, spokes and nipples are separate. Front rims are drilled 28 hole and rear rims 32 hole, so pick the rim that matches its position and your hub's hole count. Crankbrothers' Synthesis rim profile chart lists a 2.3in to 2.5in tyre range for the DH rim, and Crankbrothers wheels are for disc brakes only.

Our workshop builds wheels and can lace this rim to your hub. Wheel building is a separate workshop service and is not included in the price.

Crankbrothers warrants Synthesis carbon rims to be free of manufacturer defects for the lifetime of the product, and covers impact damage that happens while riding. Its Synthesis owner's manual says the lifetime limited warranty applies to the original owner only, asks owners to register their wheels online, and excludes damage that happens outside a riding situation, such as running a wheel over with a car. Proof of purchase is required. For warranty support, return the product to Tune Cycles and we'll manage the claim with Lusty Industries, Crankbrothers' Australian distributor.
  • Front- and rear-specific downhill rims
  • Carbon construction, tubeless ready
  • 31.5mm inner, 39.5mm outer width
  • 28 hole front, 32 hole rear
  • 27.5in or 29in
  • Lifetime rim warranty
Rim materialCarbon
Intended useDownhill
Wheel sizes (ETRTO)27.5in (584mm), 29in (622mm)
Inner width31.5mm (front and rear)
Outer width39.5mm
Rim height19mm
Spoke holes28 (front), 32 (rear)
ERD563mm (27.5in), 603mm (29in)
TubelessReady / compatible
Tyre width range2.3in to 2.5in
Weight515g (27.5 front), 550g (29 front), 555g (27.5 rear), 590g (29 rear)
BrakesDisc only
WarrantyLifetime (rim)
SKU LUS-P-CB-SYN-C-DH-RIM
Brand Crankbrothers
Shipping Weight 0.7000kg
Shipping Width 0.700m
Shipping Height 0.080m
Shipping Length 0.700m