The Freedom To Explore

R J.ACK Disc Frameset

A timeless titanium road frameset, available in two
distinct geometries, for the discerning rider

Frame only from £2050.00 // Frame & forks from £2480.00

Every frame is unique. Customisable options include bottom bracket type and bespoke, bead-blasted message.
Every frame shares the R J.ACK’s perfect balance of agility, comfort, speed and style.

Choose from two geometry options

Race: Our raciest geometry puts the rider into a more aerodynamic position, ideal for fast sportive riding, racing, and topping Strava KoM leaderboards.

Classic: Seeking more of a café racer that’s perfectly in tune with long days in the saddle? Our R J.ACK Disc Classic combines elegant style with a more back-friendly riding position, perfect for swift progress on longer rides.

Design Features
THREADED BOTTOM BRACKET

Reliability and simplicity and are king where bottom brackets are concerned and for this reason we recommend threaded bottom bracket shells. Our preference is the most common English (BSA) threaded bottom bracket design being super reliable and very easy to service and maintain. We also offer alternative designs such as the oversize T47 threaded bottom bracket shell.

TYRE CLEARANCE

Wider tyres minimise rolling resistance and maximise comfort, so the R J.ACK Disc is designed with clearance for tyres up to 32mm in both Race and Classic geometry.

INTERNAL CABLE ROUTING

Both the gear and rear brake cables are routed through the frame. This not only maintains the exquisite elegance of the frame, but also protects cables from dirt, ensuring smooth shifting and razor-sharp braking.

TAPERED HEADTUBE

A wider head tube where the fork meets the frame increases the stiffness in that area, reducing flex and improving steering precision.

R J.ACK Disc Geometry
We’re on hand to help you choose the right size frame. We have access to thousands of stack and reach figures, so by way of comparison to your current bike we can confidently recommend the correct size for you.

As a guide, we’d suggest:

  • 48cm: 152 – 158cm    |   4′ 9″ – 5′ 2″
  • 50cm: 156 – 164cm    |   5′ 1″ – 5′ 4″
  • 52cm: 162 – 170cm    |   5′ 3″ – 5′ 7″
  • 54cm: 168 – 178cm    |   5′ 6″ – 5′ 10″
  • 56cm: 174 – 184cm    |   5′ 8″ – 6′ 0″
  • 58cm: 180 – 188cm    |   5′ 11″ – 6′ 2″
  • 60cm: 186 – 194cm    |   6′ 1″ – 6′ 4″
  • 62cm: 192 – 200cm    |   6′ 3″ – 6′ 6″

If you are unsure about which size is right for you, please don’t hesitate to get in touch.

WE'RE HERE TO HELP
 'Race''Classic'
S – Stack497.4509.6
R – Reach366358
HT – Head Tube Length105 (Straight)110 (Tapered)
HA – Head Angle69.5˚70.5˚
ForkEnve Road Disc (1.125" - 1.25")J.L Road Disc (1.125" - 1.5")
AC – Fork Axle to Crown370375
FO – Fork Offset/Rake4345
TTE - Top Tube Effective518.1513.8
TT - Top Tube Actual505.5499.6
ST – Seat Tube Length472480
SA – Seat Tube Angle73˚73˚
CS – Chain Stay Length415415
WB – Wheelbase981.8971.5
FC – Front Centre Distance576.5566.2
BBD – Bottom Bracket Drop6868
Standover Height718.2728.5
Rear Axle142x12142x12
Typical Stem Length80-9080-90
Typical Handlebar Width380 or 400380 or 400
Typical Crank Length165165
Maximum Tyre Clearance32mm32mm
Maximum Tyre Clearance With MudguardsN/A28mm
Mudguard LugsNoOptional
Rack LugsNoOptional
 'Race''Classic'
S – Stack512.1520.7
R – Reach373364
HT – Head Tube Length115 (Straight)120 (Tapered)
HA – Head Angle71˚71˚
ForkEnve Road Disc (1.125" - 1.25")J.L Road Disc (1.125" - 1.5")
AC – Fork Axle to Crown370375
FO – Fork Offset/Rake4345
TTE - Top Tube Effective529.6523.2
TT - Top Tube Actual515.9510.4
ST – Seat Tube Length487500
SA – Seat Tube Angle73˚73˚
CS – Chain Stay Length415415
WB – Wheelbase980.8976.9
FC – Front Centre Distance575.4571.5
BBD – Bottom Bracket Drop6868
Standover Height732.1743
Rear Axle142x12142x12
Typical Stem Length9090
Typical Handlebar Width400400
Typical Crank Length170170
Maximum Tyre Clearance32mm32mm
Maximum Tyre Clearance With MudguardsN/A28mm
Mudguard LugsNoOptional
Rack LugsNoOptional
 'Race''Classic'
S – Stack529.8541.4
R – Reach378370
HT – Head Tube Length130 (Straight)140 (Tapered)
HA – Head Angle72˚71.5˚
ForkEnve Road Disc (1.125" - 1.25")J.L Road Disc (1.125" - 1.5")
AC – Fork Axle to Crown370375
FO – Fork Offset/Rake4345
TTE - Top Tube Effective540535.5
TT - Top Tube Actual525.5521.1
ST – Seat Tube Length505515
SA – Seat Tube Angle73˚73˚
CS – Chain Stay Length415415
WB – Wheelbase982.6985.3
FC – Front Centre Distance577.3579.9
BBD – Bottom Bracket Drop6868
Standover Height749759.6
Rear Axle142x12142x12
Typical Stem Length90 or 10090 or 100
Typical Handlebar Width400 or 420400 or 420
Typical Crank Length170170
Maximum Tyre Clearance32mm32mm
Maximum Tyre Clearance With MudguardsN/A28mm
Mudguard LugsNoOptional
Rack LugsNoOptional
 'Race''Classic'
S – Stack541560.4
R – Reach384376
HT – Head Tube Length140 (Straight)160 (Tapered)
HA – Head Angle72.5˚71.5˚
ForkEnve Road Disc (1.125" - 1.25")J.L Road Disc (1.125" - 1.5")
AC – Fork Axle to Crown370375
FO – Fork Offset/Rake4345
TTE - Top Tube Effective549.4547.3
TT - Top Tube Actual532.1532.1
ST – Seat Tube Length515530
SA – Seat Tube Angle73˚73˚
CS – Chain Stay Length415415
WB – Wheelbase987.6997.6
FC – Front Centre Distance582.2592.1
BBD – Bottom Bracket Drop6868
Standover Height758.9775
Rear Axle142x12142x12
Typical Stem Length100100
Typical Handlebar Width420420
Typical Crank Length172.5172.5
Maximum Tyre Clearance32mm32mm
Maximum Tyre Clearance With MudguardsN/A28mm
Mudguard LugsNoOptional
Rack LugsNoOptional
 'Race''Classic'
S – Stack560.1569.9
R – Reach390382
HT – Head Tube Length160 (Straight)170 (Tapered)
HA – Head Angle72.5˚71.5˚
ForkEnve Road Disc (1.125" - 1.25")J.L Road Disc (1.125" - 1.5")
AC – Fork Axle to Crown370375
FO – Fork Offset/Rake4345
TTE - Top Tube Effective561.2556.2
TT - Top Tube Actual546.5541.9
ST – Seat Tube Length535545
SA – Seat Tube Angle73˚73˚
CS – Chain Stay Length415415
WB – Wheelbase999.61006.8
FC – Front Centre Distance594.1601.2
BBD – Bottom Bracket Drop6868
Standover Height778.4786.8
Rear Axle142x12142x12
Typical Stem Length100100
Typical Handlebar Width420420
Typical Crank Length172.5172.5
Maximum Tyre Clearance32mm32mm
Maximum Tyre Clearance With MudguardsN/A28mm
Mudguard LugsNoOptional
Rack LugsNoOptional
 'Race''Classic'
S – Stack574.4586
R – Reach396388
HT – Head Tube Length175 (Straight)185 (Tapered)
HA – Head Angle72.5˚72˚
ForkEnve Road Disc (1.125" - 1.25")J.L Road Disc (1.125" - 1.5")
AC – Fork Axle to Crown370375
FO – Fork Offset/Rake4345
TTE - Top Tube Effective571.6567.2
TT - Top Tube Actual554.5552.2
ST – Seat Tube Length550560
SA – Seat Tube Angle73˚73˚
CS – Chain Stay Length415415
WB – Wheelbase1010.11013
FC – Front Centre Distance604.6607.4
BBD – Bottom Bracket Drop6868
Standover Height785.7801.3
Rear Axle142x12142x12
Typical Stem Length110110
Typical Handlebar Width420 or 440420 or 440
Typical Crank Length175175
Maximum Tyre Clearance32mm32mm
Maximum Tyre Clearance With MudguardsN/A28mm
Mudguard LugsNoOptional
Rack LugsNoOptional
 'Race''Classic'
S – Stack583.9600.3
R – Reach402394
HT – Head Tube Length185 (Straight)200 (Tapered)
HA – Head Angle72.572˚
ForkEnve Road Disc (1.125" - 1.25")J.L Road Disc (1.125" - 1.5")
AC – Fork Axle to Crown370375
FO – Fork Offset/Rake4345
TTE - Top Tube Effective580.5577.5
TT - Top Tube Actual565.2562.5
ST – Seat Tube Length565575
SA – Seat Tube Angle73˚73˚
CS – Chain Stay Length415415
WB – Wheelbase1019.11023.7
FC – Front Centre Distance613.5618
BBD – Bottom Bracket Drop6868
Standover Height800.4815.2
Rear Axle142x12142x12
Typical Stem Length110 or 120110 or 120
Typical Handlebar Width440440
Typical Crank Length175175
Maximum Tyre Clearance32mm32mm
Maximum Tyre Clearance With MudguardsN/A28mm
Mudguard LugsNoOptional
Rack LugsNoOptional
 'Race''Classic'
S – Stack600611.7
R – Reach408400
HT – Head Tube Length200 (Straight)210 (Tapered)
HA – Head Angle73˚72.5˚
ForkEnve Road Disc (1.125" - 1.25")J.L Road Disc (1.125" - 1.5")
AC – Fork Axle to Crown370375
FO – Fork Offset/Rake4345
TTE - Top Tube Effective580.5587
TT - Top Tube Actual576.5573.2
ST – Seat Tube Length580595
SA – Seat Tube Angle73˚73˚
CS – Chain Stay Length415415
WB – Wheelbase10251028
FC – Front Centre Distance619.4622.3
BBD – Bottom Bracket Drop6868
Standover Height817.8830.8
Rear Axle142x12142x12
Typical Stem Length120120
Typical Handlebar Width440440
Typical Crank Length177.5177.5
Maximum Tyre Clearance32mm32mm
Maximum Tyre Clearance With MudguardsN/A28mm
Mudguard LugsNoOptional
Rack LugsNoOptional

All measurements in millimetres unless otherwise specified

Technical Information

Wheels: Rear axle: 142mm (12mm thru-axle)
Front axle: 100mm
Tyres: Max width: 32mm
Whilst we believe the above information to be accurate there may be compatibility issues with some untested combinations of rims and tyres.
Seat post: 27.2mm
Seat clamp: 31.8mm
Front derailleur: 31.8mm, band on.
Bottom Bracket: BSA Threaded 68mm wide shell
Brakes: Recommended rotor size rear: 160mm
Disc brake caliper mount rear: Flat mount

Features:

  • 12mm Thru-axle as standard
  • Elegant design
  • Internal cable routing
  • Choose from two geometry options
  • Electronic groupset ready on request
  • Timeless bead blasted graphics
  • Threaded bottom bracket
  • Bespoke painting options
  • Available in brushed or Pavé finish
  • Tapered head tube
  • Up to 32mm tyre clearance
  • Durable 3Al-2.5V titanium tubing
  • Seatpost clamp included

‘RACE’
ÆRA Road Disc Fork:
Rake: 43mm
Axle to crown: 368mm
12mm Thru-axle – 100mm spacing
Max tire clearance: 32mm
1.125” – 1.5” carbon steerer
Crown race diameter: 1.5″
Internal cable routing
Available with or without mudguard mounts
ÆRA Thru-axle supplied
160mm rotor

Headtube/headset:
1.125” – 1.5”
Headset bearings: Hope Technology, integral
Top cup diameter: 44mm
Top cup stack height: 8.6mm (including 3 shims)
Bottom cup diameter: 56mm
Bottom cup stack height: 5.8mm (including crown race)

‘CLASSIC’
ÆRA Road Disc Fork:
Rake: 45mm
Axle to crown: 375mm
12mm E-Thru-axle dropouts: 100mm spacing
Max tire clearance: 30mm
1.125” – 1.5” tapered carbon steerer
Crown race diameter: 1.5″
Internal cable routing
Available with or without mudguard mounts
ÆRA Thru-axle included
160mm rotor

Headtube/headset:
1.125” – 1.5”
Headset bearings: Hope Technology, integral
Top cup diameter: 44mm
Top cup stack height: 8.6mm (including 3 shims)
Bottom cup diameter: 56mm
Bottom cup stack height: 5.8mm (including crown race)

Have a question about this frameset?

Feel free to contact us if you have any questions at all, we’d love to hear from you.

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