Specs

27.5"+ 29"

The ‘Primer’ is a bike built for 29 or 27.5+ wheels with geometry designed for aggressive all mountain riding. It is handbuilt in Canada by local fabricator Mike Truelove, in small batches that are painted individually for each customer.

The Primer uses what we would describe as our most progressive 29er geometry to date. The shortest stays possible. Lower than ever BB height. A steep seattube with a slack head angle, low stack headtube and long front center. This combination is the best descending 29er we’ve ridden yet but it still climbs as well as anything we’ve built before.

Building a frame with 27.5+ compatibility means that we had to redesign our ‘yokel’ junction to maximize the chainstay layout clearance. Incorporating a BB92 bb shell and boost dropout spacing also accommodates the most room possible for tire widths as wide as 3.0.

  • Handmade in British Columbia, Canada by Mike Truelove
  • Tire clearance – 29 x 2.5 / 27.5 x 3.0*
  • Head Angle 65 degrees – 160mm fork
  • Seat Angle 75 degrees
  • BB height 12.6” / 320mm (29” tire)
  • Chainstay Length 415mm
  • Headtube Tapered 44-56mm
  • Seatpost size 31.6 with Stealth routing
  • BB Shell BB92
  • Rear hub spacing 12 x 148mm
  • Frame weight 6.3lbs
  • 1X drivetrains only
  • max chainring size of 32T (boost chainline)
  • minimum recommended fork travel of 140mm (standard at 160)

 

Colours

This bike is a reflection of you, so choosing your own colour is part of the package. Whatever you decide, we will make it happen. Different finishes and effects are available for additional cost. Call us for details.


Features

Head tube badges

Bikes are special. The headtube badge is the finishing touch so we’ve always made a point of taking the time to do something interesting with it. Our headtube badges have changed over the years and are an indication of the time each bike was made. Whether it’s a cast bronze, or polished stainless steel, water cut aluminum or a 3D CNC carving, each one represents our commitment to detail.

Yokel

Our ‘Yokel’ design is a small machined junction on the chainstay that helps accommodate both tire clearance and chainring clearance. Our first versions were huge CNC yokes that bridged the entire front end of the chainstays. Over time we refined this to minimize weight by arranging our chainstay layout asymmetrically and reducing the yoke to a minimal size. It’s one of our most unique frame features and has been copied by other frame makers.

Tubing

Making modern chromoly frames is challenging when most of the tubes available on the market are from an era of mountain biking long past. After several years of frame production we reached the point where we could design and produce our own custom tubing for the majority of our frame tubes. This contributes to the unique look of many of our frames but more importantly allows us to configure our bikes exactly as we want for each design.


 

 


Geometry

  
Chainstay 16.3" / 415mm
Headtube 4.1" / 105mm
Head Angle 65°
Seattube Angle 75°
BB Height 29”-12.6"/320mm (27.5x3.0”~12.5”317mm, 27.5x2.8~12.4”315mm)
Seatpost Size 31.6mm with Stealth Routing
Headset Size 44mm/56mm
BB Shell BB92
*measured with a 160mm fork.  Optimal 150-170mm.

Sizing

 MM/LLXL
TYPICAL RIDER HEIGHT 5'5"-5'10
165-178cm
5'8"-6'2"
173-188cm
6'-6'4"
183-193cm
6'3"-6'7"
190-199cm
TOPTUBE LENGTH (EFFECTIVE) 23.75"
603mm
24.5"
620mm
25.5"
648mm
26.25"
667mm
SEATTUBE LENGTH (BB - TOP ST) 17"
431mm
18.5"
470mm
19.5"
495mm
21"
533mm
REACH 428mm 447mm 473mm 492mm
STACK 653mm 653mm 653mm 653mm

Complete Builds

PARTSGX EAGLE BUILDEAGLE XO1 BUILD
FORK Rock Shox LYRIK RC 170/150 2P Rock Shox LYRIK RC 170/150 2P
STEM Chromag HiFi 40mm Chromag HiFi 40mm
HANDLEBAR Fubars OSX 25mm Rise Fubars OSX 25mm Rise
HEADSET Cane Creek Forty ZS Cane Creek Forty ZS
CRANK SRAM GX-1400 1x X-SYNC X01 EAGLE
BRAKES SRAM Guide RS B1 SRAM Guide RSC B1
ROTORS 180mm Centreline 180mm Centreline
SHIFTERS SRAM GX 12 SPD X01 EAGLE
CASSETTE SRAM XG-1275 SRAM XG-1295 EAGLE 10-50
REAR DERAILLEUR SRAM GX 1X12 SRAM XO1 EAGLE
WHEELSET Chromag Phase30 Rims with Chromag Magna Hubs 27.5+ or 29 Chromag Phase30 Rims with Chromag Magna Hubs 27.5+ or 29
TIRES Maxxis Minion Fr/Minion Rr Maxxis Minion Fr/Minion Rr
SEATPOST Chromag Dolomite Chromag Dolomite
SADDLE Chromag Trailmaster DT Chromag Trailmaster DT
GRIPS Chromag Basis Chromag Basis
CHAIN SRAM GX EAGLE Chain SRAM X01 EAGLE Chain
PEDALS - -
PRICE $4,900 CAD
$4,250 USD*
$5,950 CAD
$5,150 USD*
FRAME ONLY $1,900 CAD
$1,650 USD*
 
  RockShox Reverb Seat Dropper optional.
*US pricing applies to all US and International purchases.

To purchase, please contact us directly. We are happy to answer all your questions about our bikes and products.
Call: 604-905-6667
Email: info@chromagbikes.com