Tonga Generation 2

Frame Aluminium 6061
Weight 27.5" 14.3 kg | 29" 14.6 kg
Sizes 27.5" - 14", 16" | 29" - 18", 20", 22"
Colors Bitter Lemon
Blue Turquoise

Pricing

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Your Ticket to Trail Fun

Hydraulic Tektro disc brakes plus drivetrain from Shimano. A SR Suntour suspension fork with 100 millimeter travel. In addition, a well crafted aluminium frame with relaxed geometry and wheel size matched to frame size. Hard to believe how inexpensive your access to undisturbed bike fun can be!

  • The carefree entry into the STEVENS aluminium hardtail world
  • 740 mm handlebar width for maximum control
  • Shimano CUES U4000 Linkglide 2x9-speed groupset w/ optimized gearing range
  • Powerful, reliable Tektro disc brakes
  • Responsive suspension fork with 100 mm of travel

Specifications

Details

Illustration may differ. Specification subject to change.

Chassis

Frame
Aluminium 6061
  • O.L.D.: 135 mm
  • Brake: IS disc
  • BB: BSA 73 mm
  • Front derailleur mount: clamp
  • Cable routing: external
  • Rack mounts
Fork
SR Suntour XCM DS
  • Travel: 100 mm
  • Coil spring
  • Steerer 1 1/8"
  • O.L.D.: 100 mm
  • Brake: postmount disc 6"
Headset
STEVENS MTB 1 1/8"
  • Upper bearing cup: ZS44/28.6
  • Lower bearing cup: ZS44/30
Brake front
Tektro HD-T275
  • Hydraulic disc brake
Brake rear
Tektro HD-T275
  • Hydraulic disc brake
Brake disc front
Tektro TR180-35
  • Rotor size: 180 mm
  • Center Lock
Brake disc rear
TR160-35
  • Rotor size: 160 mm
  • Center Lock

Drivetrain

Crankset
Shimano CUES U4000
  • Shimano FC-U4010-2
  • 36-22 T
  • 2-Piece
Derailleur front
Shimano CUES U4000
  • FD-U4000-LM4
  • 2-speed
Derailleur rear
Shimano CUES U4000 Shadow
  • RD-U3020-SGS
  • 9-speed
  • Total capacity: 41 T
Chain
Shimano CN-LG500 | 29": Shimano CN-HG53
  • LINKGLIDE
Cassette
Shimano CS-LG300-9
  • 9-speed
  • Combination: 11-13-15-17-20-23-26-30-36 T
Pedals
ATB Pro Reflex

Wheelset

Hubs rear
Formula CL-52
  • Axle: QR5x135 mm
Hubs front
Formula CL-51
  • Axle: QR5x100 mm
Rims
Oxygen RM-M19
  • ETRTO: 27.5": 19 x 584 | 29": 19 x 622
Tires
Schwalbe Smart Sam Active-Line
  • Tire size: 27.5": 57-584 | 29": 57-622
  • SBC compound
  • KevlarGuard

Cockpit

Handlebar
Oxygen Driver
  • Width: 740 mm
  • Backsweep: 9°
  • Rise: 25.4 mm
  • Clamp: 31.8 mm
Stem
Oxygen Driver
  • Handlebar clamp: 31.8 mm
  • Angle: 6°
Saddle
Oxygen Havoc
Seatpost
Oxygen Driver
  • Length: 350 mm
  • Diameter: 27.2 mm
  • Insertion depth: min. 100 mm
Shift lever left
Shimano CUES U4000
  • SL-U4000-L
  • 2-speed
Shift lever right
Shimano CUES U4000
  • SL-U4000-9R
  • 9-speed
Brake lever
Tektro HD-T275
  • 3 finger

Data

Weight
27.5" 14.3 kg | 29" 14.6 kg
Laden weight
115 kg
Color(s)
Bitter Lemon | Blue Turquoise
Sizes
27.5" - 14", 16" | 29" - 18", 20", 22"
 

Geometry

schematische Skizze eines Fahrrades mit eingezeichneten Geometrie-Messpunkten

The online size guide does not replace advice from a specialist retailer. It serves as an initial orientation and may differ from personal preferences. A test ride offers the best comparison.

Frame height (")   14 16 18 20 22 Measuring mode
Seattube length A1 579 584 633 642 656 nominal
Seattube length A2 355 406 457 508 558 bottom bracket to top of seattube
Seattube length A3 325 374 402 453 503 bottom bracket to top of top tube
Top tube length B 534 550 575 592 612
Top tube horizontal C 540 565 595 615 635 center headtube to center seatpost/seattube
Headtube angle (°) D 69 69 70 70 70
Seattube angle (°) E 74,5 74,5 73,5 73,5 73,5
Wheelbase F 1057 1083 1104 1125 1146
Chainstay length G 435 435 450 450 450
Headtube length H 90 95 100 110 125
Bottom bracket drop I 50 50 70 70 70 distance of bottom bracket to hub level*
Bottom bracket height K 301 301 301 301 301 distance to ground*
Fork rake L 42 42 46 46 46
Slope M 239 198 217 177 143 top tube level distance front to rear
Wheel radius front N1 354 354 373,5 373,5 373,5 tyred
Wheel radius rear N2 354 354 373,5 373,5 373,5 tyred
Standover height O 705 735 770 803 838 top of top tube to ground**
Top tube height O1 354 384 399 432 467 standover height minus bottom bracket height
Fork build height P 467 467 486 486 486 incl. lower headset cups*
Front wheel - bottom bracket Q 627 653 663 683 705
Reach R 385 409 415 432 449 center bottom bracket to center headtube, horizontal
Stack S 558 562 608 618 632 center bottom bracket to center headtube, vertical
Stack/Reach (1:x)   1,45 1,37 1,47 1,43 1,41 ratio stack to reach
Seatpost diameter   27,2 27,2 27,2 27,2 27,2
Stem length   70 70 90 110 120 center-center
Stem angle (°)   6 6 6 6 6
Handlebar diameter   31,8 31,8 31,8 31,8 31,8
Assembled spacers   12,9 + 3*5 + 10
Handlebar width   740 740 740 740 740
Cranklength   170 170 175 175 175
    14 16 18 20 22  

* Values measured with rider on board and slightly compressed front fork / rearshock (regular riding position)

** measured 100 mm ahead of bottom bracket, fork and rearshock not compressed (static)