TENSION 1
The Tension 1 is the perfect bike for those wishing to start working their way up the cyclocross ranks. With its competition-ready legal build, our entry-level racer gives you everything you need to start earning those podium places with a competent aluminium frame and lightweight carbon fork. A Sram Apex One groupset with single-chainring 11-speed gearing – though wide for Elite level racing – will leave you enough in reserve lest you stall mid-race or enjoy taking it easy in the off-season.
Designed for hour-long racing efforts, or hacking through the woods at maximum speed.
HIGHLIGHTS
-
![]()
WHEELS
Size XS and S will come with 650B wheels to ensure proper fit without any compromises in geometry.
-
![]()
FRAME
Lightweight aluminium frame with heavily hydro formed tube profiles and T47 bottom bracket.
-
![]()
FORK
Full carbon fork with through axles and flat mount disc brake.
-
![]()
HUBS
Bombtrack Arc disc brake hubs with 12 mm through axles.
-
![]()
CRANK
Bombtrack Lyer 30 mm aluminium crank with 40t direct mount chainring.
-
![]()
DISC BRAKES
Hydraulic Sram Apex 1x11 groupset and brakes with 11 - 42t cassette.
SPECIFICATIONS
| TENSION 1 | |
|---|---|
| Color 1 | Matt Rock Grey |
| Color 2 | - |
| Frame | 6061-T6 double butted aluminium, TA, rack / fender mounts, 86.5 mm BB T47 shell |
| Fork | Full carbon, TA, 1.1/2'' - 1.1/8'', fender mounts |
| Handlebar | BOMBTRACK CX-10 drop bar, 31.8 mm, 10° flare |
| Grips | BOMBTRACK COMMAND bar tape |
| Stem | BOMBTRACK ROAM forged aluminium stem, -7° |
| Headset | Sealed integrated aheadset, 1.1/2'' - 1.1/8'' |
| Levers | SRAM APEX 1 double tap hydraulic |
| Shifter | SRAM APEX 1 double tap 1 x 11 |
| Brakes | SRAM APEX flat mount hydraulic disc brakes with 140 mm rotors |
| Crankset | BOMBTRACK LYER forged aluminium crank, direct mount interface (SRAM compatible),30 mm spindle |
| BB | BOMBTRACK T47 internal sealed BB for 30 mm spindle |
| Pedals | - |
| Chain | KMC X11 chain, 1/2'' x 11/128'', 114L |
| Chainring | CNC machined aluminium, narrow-wide, 40 T |
| Cassette | SRAM PG-1130 11-speed, 11 - 42 T |
| Front derailleur | - |
| Rear derailleur | SRAM APEX 1, clutch, long cage |
| Front hub | BOMBTRACK ARC sealed hub, 6-bolt disc |
| Rear hub | BOMBTRACK ARC sealed hub, 11-speed, 6-bolt disc |
| Through axle | 12 x 100 mm / 12 x 142 mm |
| Front rim | WTB ST i19 double wall, TCS 2.0, 32h |
| Rear rim | WTB ST i19 double wall, TCS 2.0, 32h |
| Saddle | BOMBTRACK DART saddle |
| Seat post | BOMBTRACK BEECH 27.2 mm x 300 mm |
| Seat clamp | BOMBTRACK ORIGIN 31.8 mm |
| Front tire | XS - S VEE TIRE XCX 120 TPI TLR 32-584 / M - XL CHALLENGE GRIFO TLR 33-622, tubeless ready |
| Rear tire | XS - S VEE TIRE XCX 120 TPI TLR 32-584 / M - XL CHALLENGE GRIFO TLR 33-622, tubeless ready |
| Fender | - |
| Rack | - |
| Kickstand | - |
| Light | - |
| Weight | 9.4 kg (size M) |
| Weight frameset | 1580 g frame (size L, incl. TA, hanger) / 610 g fork (300 mm steerer, incl. TA) |
| Maximum rider weight | 120 kg incl. luggage |
| ASTM riding condition | 2 |
Final product may vary in appearance, finish and minor details.
BUILD INFOS
| Model | TENSION 1 |
|---|---|
| BB standard | T47 - 86.5 mm shell width |
| Headset standard (S.H.I.S.) | IS42 / 28.6 | IS52 / 40 |
| Headset crown race angle | 45° |
| Fork max tire clearance w/o fender | XS - S 650B x 37C / M - XL 700C x 37C |
| Frame max tire clearance w/o fender | XS - S 650B x 35C / M - XL 700C x 37C |
| Maximum chainring clearance 1x | 42 T with 45 mm chainline |
| Maximum chainring clearance 2x | 50 / 34 T with 43.5 mm chainline |
| Seat post diameter | 27.2 mm |
| Seat clamp diameter | 31.8 mm |
| Front derailleur clamp diameter | 31.8 mm |
| Brake mount front | FM |
| Brake mount rear | FM |
| Maximum rotor clearance front | 160 mm |
| Maximum rotor clearance rear | 160 mm |
| Front through axle | 12 mm x 100 mm, 1.5 thread pitch |
| Rear through axle | 12 mm x 142 mm, 1.5 thread pitch |
| ISO testing standard | Road |
| Crankarm | XS - S 165 mm / M 170 mm / L - XL 175 mm |
| Q Factor | 152 mm |
| BCD crank | Direct mount (Sram compatible) |
| Chainline | 45 mm |
| Chainring offset | 5 mm |
| Spoke length front wheel | XS - S 273, 274mm / M - XL 291 mm, 293 mm |
| Spoke length rear wheel | XS - S 274, 272mm / M - XL 293 mm, 291 mm |
| Spoke count (front / rear) | 32 / 32 |
| ERD | XS - S 570 mm / M - XL 604 mm |
| Front hub PCD | 58 mm |
| Rear hub PCD | 58 mm |
| Front hub flange distance / offset | 56.5 mm center to center / 6.6 mm |
| Rear hub flange distance / offset | 51 mm center to center / 8.8 mm |
| Stem length | XS - S 80 mm / M 90 mm / L - XL 100 mm |
| Stem angle | -7° |
| Headset spacers | 1 x 10 mm, 2 x 5 mm |
| Seat post offset | 24 mm |
| Seat post length | 315 mm |
| Derailleur hanger | BT-DH-018 |
| Frame small parts | BT-CR-013 |
| Hub end caps front | BT-HC-012 |
| Hub end caps rear | BT-HC-017 |
| Cassette body | BT-CB-006 |
| Crankarm bolt | BT-CRP-002 |
| Through axle front | BT-TA-F-603 |
| Through axle rear | BT-TA-R-601 |
GEOMETRY
FRAME GEOMETRY
| Model | TENSION 1 | ||||
|---|---|---|---|---|---|
| Bike Size | XS | S | M | L | XL |
| Wheel size | 650B | 650B | 700C | 700C | 700C |
| Seat Tube Length | 460 | 490 | 530 | 560 | 590 |
| Horizontal TT length | 507 | 523 | 552 | 570 | 586 |
| Seat Angle | 73.5° | 73.5° | 73.0° | 73.0° | 73.0° |
| Seat Angle effective | 73.5° | 73.5° | 73.0° | 73.0° | 73.0° |
| Head Angle | 71.0° | 71.5° | 71.5° | 72.0° | 72.0° |
| Headtube Length | 100 | 115 | 139 | 162 | 179 |
| BB Drop | 55 | 55 | 65 | 65 | 65 |
| Chainstay Length | 410 | 410 | 425 | 425 | 425 |
| Fork Offset | 45 | 45 | 45 | 45 | 45 |
| Trail | 67 | 64 | 70 | 66 | 66 |
| Wheelbase Length | 967 | 979 | 1014 | 1028 | 1044 |
| Standover | 734 | 757 | 799 | 825 | 848 |
| Reach | 355 | 366 | 380 | 391 | 402 |
| Stack | 514 | 530 | 563 | 587 | 603 |
| Front Center | 563 | 575 | 598 | 611 | 627 |
| Axle to Crown | 400 | 400 | 400 | 400 | 400 |
| Minimum rider height ¹ | 1500 | 1600 | 1700 | 1790 | 1880 |
| Maximum rider height ¹ | 1610 | 1710 | 1810 | 1900 | 1990 |
¹ Our bike size recommendation generally represents a rough guideline for quickly narrowing down the sizes from which to choose based on the body height. Bike fitting is a complex topic and other measurements and factors have to be accounted for as well. Since no two human bodys are exactly the same it is not possible to give a 100% correct advice for everyone. Therefore BOMBTRACK cannot guarantee for the stated recommendations to be correct for every individual customer. The best way to work out the correct size is to consult a local BOMBTRACK dealer or a professional bike fitter and have them determine the needed size.
HANDLEBAR GEOMETRY
| Model | TENSION 1 | ||||
|---|---|---|---|---|---|
| Bike Size | XS | S | M | L | XL |
| Handlebar type | Dropbar | Dropbar | Dropbar | Dropbar | Dropbar |
| Width (drops) | 400 | 400 | 420 | 440 | 440 |
| Width (barends) | 446 | 446 | 466 | 486 | 486 |
| Reach | 75 | 75 | 75 | 75 | 75 |
| Flare | 10° | 10° | 10° | 10° | 10° |
| Backsweep | - | - | - | - | - |
| Drop | 116 | 116 | 116 | 116 | 116 |
| Upsweep | - | - | - | - | - |
| Rise | - | - | - | - | - |
