Steilacoom RCX

At home in some of the wettest, muddiest, gnarliest terrain in the world, we know a thing or two about what it takes to make a mean cyclocross bike: one that sheds mud, ports easy and crushes any root or rock in its path. We understand that a light and stiff platform—via BB30—equates to more acceleration and control while out of the saddle. We also know that a flatter top tube for easy portage and the right geometry are essential to winning any race.

The 2012 Diamondback Steilacoom RCX is the perfect embodiment of everything Northwest. It’s well-equipped to tackle any single track, mud field, sand pit, staircase, hurdle or inclement weather between the starting gate and the finish line. At the core is the DBR CX Fully Butted 7005 Alloy Competition Cyclocross frame with formed top tube and an integrated headtube. The frame is light and durable which is something that we look for in a cross bike. The formed top tube features a flat bottom for easy portage over any hurdle.

Paired well with the frame is an Easton EC-70X Carbon fork that’s exceptionally strong and stiff. With an alloy steerer and clearance for larger tires and fenders, the fork is a versatile and exceptional addition.

Component pairing comes in hot and proper with a Shimano 105 build including cassette, chain, front and rear derailleur and dual control 10spd brake lever/shifters which are linked to Avid Shorty 4 canti’s to stop ya on the drop of a dime. The FSA Gossamer PRO Cross crankset is standard as far as cross cranks are concerned and the BB30 technology offers a light weight and exceptionally stiff pedaling platform. For the 46t & 36t double set.

Equation CX20 cross rims are light and stiff and look amazing with white spokes laced to sealed cartridge bearing hubs. Michelin Cyclocross Mud 2 700×30c tires create a grippy equation for any situation.

DBR drop bars and a DBR 3D forged stem offer precise and accurate steering while the DBR Performance Micro Adjust alloy Post (27.2mm) supports a WTB VALCON Race saddle for maximum comfort with race friendly size and weight in mind.

The 2012 Steilacoom RCX is blacked out and comes in 4 sizes: 50cm, 53cm, 56cm, 59cm.

Whether you are looking for a true dedicated and capable cross bike for the season or are simply looking for an adept and stable commuter, you’ve ain’t got no reason to look further.


  • DBR 7005 Aluminum Competition Cross Frame
  • EASTON EC-70 X Carbon Cross Fork w/Alloy Steerer
  • FSA Gossamer Pro Cross BB30 Crankset
  • Shimano 105 Derailleur’s & 10-Spd Dual Control Shifters
  • Equation CX20 Aluminum Rims w/ Stainless Steel Spokes

Bike Specs

Sizes 50cm  53cm  56cm  59cm 
Frame DBR CX Fully Butted 7005 Alloy Competition Cyclocross Geometry, Formed Top tube w/integrated Headtube, BB30
Fork Easton EC-70X Carbon w/Alloy Steerer
Rear Shock N/A
Cranks FSA Gossamer PRO Cross BB30 46,36t
Bottom Bracket BB30
F. Derailleur Shimano 105, 31.8
R. Derailleur Shimano 105 10spd
Shifter Shimano 105 Dual Control 10spd
Brake Levers Shimano 105 Dual Control 10spd
Brakes AVID Shorty 4 canti
Cassette Shimano CS-5700 105 10spd (12-27t)
Rims 20h frt / 24h rear Equation CX20
Tires Michelin Cyclocross Mud 2 700x30
Pedals test ride
Handlebar DBR Drop Bar Road 31.8
Stem DBR 3D forged, +/-7 degree rise 31.8
Seatpost DBR Performance Post, Alloy Micro Adjust 27.2mm
Headset Integrated "Cane Creek" Size Drop-in ACB 1 1/8"
Colors Black
Chain Shimano 105 10spd
Hubset (F) 20H Alloy, Sealed Bearing QR (R) 24H Alloy, Sealed Bearing, Cassette, QR
Spokes White 14g Stainless Steel
Grips DBR Cork w/Gel
Extras Owner’s manual, Chainstay Protector, Clear Coat, H20 bottle mounts
Note Specifications Subject to Change


Size 50cm 53cm 56cm 59cm
Seat Tube Length ** 500.0mm 530.0mm 560.0mm 590.0mm
Standover Height 769.0mm 795.0mm 825.0mm 853.0mm
Top Tube Length * 525.0mm 540.0mm 560.0mm 580.0mm
Stack 521.0mm 543.0mm 578.0mm 604.0mm
Reach 378.0mm 380.0mm 382.0mm 395.0mm
Head Tube Length 100.0mm 120.0mm 155.0mm 180.0mm
Head Angle 71.0° 72.0° 72.3° 73.0°
Seat Angle 75.0° 74.0° 73.0° 73.0°
Wheel Base 1000.0mm 1005.0mm 1011.0mm 1027.0mm
Chain Stay Length 425.0mm 425.0mm 425.0mm 425.0mm
Fork Offset 45.0mm 45.0mm 45.0mm 45.0mm
BB Drop 65.0mm 65.0mm 65.0mm 65.0mm
Stem Length 80.0mm 90.0mm 100.0mm 110.0mm
Handlebar Width 420.0mm 420.0mm 440.0mm 440.0mm
Crank Length 170.0mm 172.5mm 172.5mm 175.0mm
Seat Post Length 300.0mm 300.0mm 300.0mm 300.0mm
* Measured Horizontally ** Measured from Center

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