Tables

Amount of torque

Gear 1 2 3 4 5 6 7 8 9 10 11 12 13 14
% 98 82 68 55 44 34 25 18 11 5   5 9 12
backward ✘ ✘ ✘ ✘ ✘ ✘ ✘ ✘ ✘ ✘        
forward                       ✘ ✘ ✘

Inner gear ratio

Technical changes reserved!
Gear 1 2 3 4 5 6 7 8 9 10 11 12 13 14
IGR 0.279 0.316 0.360 0.409 0.464 0.528 0.600 0.682 0.774 0.881 1.000 1.135 1.292 1.467

Meters of Development Tables

Primary Transmission Factors for mid-motor eBikes

Vehicle typeMin. Primary
Transmission Factor		Max. Input Torque at
SPEEDHUB Sprocket*		EU Approved
eBike Motor**		Non EU Approved
eBike Motor***		Max.
System Weight		Max.
Wheel Load
Solo Bicycle
Rider weight = ≤100kg		1.9130 Nm✔️✔️250 kg150 kg
Tandem
Rider weight = >100kg		2.5130 Nm✔️❌250 kg150 kg
Cargo / Recumbent
SPEEDHUB located in wheel		2.5130 Nm✔️❌250 kg150 kg
Cargo / Recumbent
SPEEDHUB located in wheel		3.0130 Nm✔️❌>250 kg150 kg
Cargo / Recumbent
SPEEDHUB located in frame		2.5130 Nm✔️❌250 kg---
Cargo / Recumbent
SPEEDHUB located in frame		3.0130 Nm✔️❌>250 kg---

✔️  Approved and Authorized for SPEEDHUB use    
❌ Non approved / Not authorized for SPEEDHUB use    
* 130Nm input = force created by rider, plus motor, divided by Primary Transmission Factor (PTF)

e.g.:    

  • Rider creates 150Nm. Motor creates 100Nm. PTF of 2.5 = 150+100 = 250/2.5 = 100 (100Nm = OK).
  • Rider creates 250Nm. Motor creates 100Nm. PTF of 2.5 = 250+100 = 350/2.5 = 140 (140Nm = NOT OK).

** Max. 250W Nominal Power / Max. 800W Peak Power    
*** Max. > 250W Nominal Power / Max. > 800W Peak Power    

Min. primary transmission factor
Solo cyclists under 100 kg = 1.9
Tandem, Cargo, Recumbent applications or cyclists over 100 kg = 2.5 (in table highlighted in bold)
Sprockets 13 or 14 teeth = 3.0* (in table highlighted in bold)

*A higher factor of 3.0 has been introduced for 13 and 14 tooth sprockets, for all areas of application, to protect against overloading.

Last update: 19/05/2021

Sprocket calculator

Meters of Development - 20'' Wheels

Distance traveled per crank revolution with 20'' wheels (circumference 1.51 m). In the top row are the sprockets, in the left column the corresponding chainring. Details from-to in meters per crank revolution.

 13 teeth14 teeth15 teeth16 teeth17 teeth18 teeth19 teeth21 teeth
28 teeth  0.79 - 4.13     
30 teeth  0.84 - 4.430.79 - 4.15    
32 teeth  0.90 - 4.730.84 - 4.430.79 - 4.17   
34 teeth  0.95 - 5.020.90 - 4.710.84 - 4.430.80 - 4.18  
36 teeth  1.01 - 5.320.95 - 4.980.89 - 4.690.84 - 4.430.80 - 4.20 
38 teeth  1.07 - 5.611.00 - 5.260.94 - 4.950.89 - 4.680.84 - 4.43 
40 teeth1.30 - 6.82 1.12 - 5.911.05 - 5.540.99 - 5.210.94 - 4.920.89 - 4.660.80 - 4.22
42 teeth1.36 - 7.161.26 - 6.651.18 - 6.201.11 - 5.811.04 - 5.470.98 - 5.170.93 - 4.900.84 - 4.43
44 teeth1.43 - 7.501.32 - 6.961.24 - 6.501.16 - 6.091.09 - 5.731.03 - 5.410.98 - 5.130.88 - 4.64
46 teeth1.49 - 7.841.38 - 7.281.29 - 6.791.21 - 6.371.14 - 5.991.08 - 5.661.02 - 5.360.92 - 4.85
48 teeth1.56 - 8.181.44 - 7.591.35 - 7.091.26 - 6.651.19 - 6.251.12 - 5.911.06 - 5.600.96 - 5.06
50 teeth1.62 - 8.521.50 - 7.911.40 - 7.381.32 - 6.921.24 - 6.521.17 - 6.151.11 - 5.831.00 - 5.27
52 teeth1.69 - 8.861.56 - 8.231.46 - 7.681.37 - 7.201.29 - 6.781.22 - 6.401.15 - 6.061.04 - 5.49
54 teeth1.75 - 9.201.62 - 8.541.52 - 7.971.42 - 7.481.34 - 7.041.26 - 6.651.20 - 6.301.08 - 5.70
56 teeth1.81 - 9.541.69 - 8.861.57 - 8.271.47 - 7.751.39 - 7.301.31 - 6.891.24 - 6.531.12 - 5.91

Meters of Development - 26'' Wheels

Distance traveled per crank revolution with 26'' wheels (circumference 1.51 m). In the top row are the sprockets, in the left column the corresponding chainring. Details from-to in meters per crank revolution.

 13 teeth14 teeth15 teeth16 teeth17 teeth18 teeth19 teeth21 teeth
28 teeth  1.07 - 5.64     
30 teeth  1.15 - 6.041.08 - 5.67    
32 teeth  1.23 - 6.451.15 - 6.041.08 - 5.69   
34 teeth  1.30 - 6.851.22 - 6.421.15 - 6.041.09 - 5.71  
36 teeth  1.38 - 7.251.29 - 6.801.22 - 6.401.15 - 6.041.09 - 5.73 
38 teeth  1.46 - 7.661.37 - 7.181.28 - 6.761.21 - 6.381.15 - 6.04 
40 teeth1.77 - 9.30 1.53 - 8.061.44 - 7.561.35 - 7.111.28 - 6.721.21 - 6.361.09 - 5.76
42 teeth1.86 - 9.761.72 - 9.071.61 - 8.461.51 - 7.931.42 - 7.471.34 - 7.051.27 - 6.681.15 - 6.04
44 teeth1.95 - 10.231.81 - 9.501.69 - 8.861.58 - 8.311.49 - 7.821.40 - 7.391.33 - 7.001.20 - 6.33
46 teeth2.03 - 10.691.89 - 9.931.76 - 9.271.65 - 8.691.56 - 8.181.47 - 7.721.39 - 7.321.26 - 6.62
48 teeth2.12 - 11.161.97 - 10.361.84 - 9.671.72 - 9.071.62 - 8.531.53 - 8.061.45 - 7.631.31 - 6.91

Meters of Development - 650B Wheels

Distance traveled per crank revolution with 650B wheels (circumference 2.15 m). In the top row are the sprockets, in the left column the corresponding chainring. Details from-to in meters per crank revolution.

 13 teeth14 teeth15 teeth16 teeth17 teeth18 teeth19 teeth21 teeth
28 teeth  1.12 - 5.89     
30 teeth  1.20 - 6.311.12 - 5.91    
32 teeth  1.28 - 6.731.20 - 6.311.13 - 5.94   
34 teeth  1.36 - 7.151.27 - 6.701.20 - 6.311.13 - 5.96  
36 teeth  1.44 - 7.571.35 - 7.101.27 - 6.681.20 - 6.311.14 - 5.98 
38 teeth  1.52 - 7.991.42 - 7.491.34 - 7.051.27 - 6.661.20 - 6.31 
40 teeth1.85 - 9.70 1.60 - 8.411.50 - 7.891.41 - 7.421.33 - 7.011.26 - 6.641.14 - 6.01
42 teeth1.94 -10.191.80 - 9.461.68 - 8.831.57 - 8.281.48 - 7.791.40 - 7.361.33 - 6.971.20 - 6.31
44 teeth2.03 -10.681.89 - 9.911.76 - 9.251.65 - 8.671.55 - 8.161.47 - 7.711.39 - 7.301.26 - 6.61
46 teeth2.12 -11.161.97 -10.361.84 - 9.671.72 - 9.071.62 - 8.531.53 - 8.061.45 - 7.641.31 - 6.91
48 teeth2.21 -11.652.06 -10.811.92 -10.091.80 - 9.461.69 - 8.911.60 - 8.411.52 - 7.971.37 - 7.21

Meters of Development - 28'' Wheels

Distance traveled per crank revolution with 28'' wheels (circumference 2.18 m). In the top row are the sprockets, in the left column the corresponding chainring. Details from-to in meters per crank revolution.

 13 teeth14 teeth15 teeth16 teeth17 teeth18 teeth19 teeth21 teeth
28 teeth  1.14 - 5.97     
30 teeth  1.22 - 6.401.22 - 6.40    
32 teeth  1.30 - 6.821.22 - 6.401.14 - 6.02   
34 teeth  1.38 - 7.251.29 - 6.801.22 - 6.401.15 - 6.04  
36 teeth  1.46 - 7.681.37 - 7.201.29 - 6.771.22 - 6.401.15 - 6.06 
38 teeth  1.54 - 8.101.44 - 7.601.36 - 7.151.28 - 6.751.22 - 6.40 
40 teeth1.87 - 9.84 1.62 - 8.531.52 - 8.001.43 - 7.521.35 - 7.111.28 - 6.731.16 - 6.09
42 teeth1.97 - 10.331.82 - 9.591.70 - 8.951.60 - 8.391.50 - 7.901.42 - 7.461.34 - 7.071.22 - 6.40
44 teeth2.06 - 10.821.91 - 10.051.78 - 9.381.67 - 8.791.57 - 8.281.49 - 7.821.41 - 7.411.27 - 6.70
46 teeth2.15 - 11.322.00 - 10.511.87 - 9.811.75 - 9.191.65 - 8.651.55- 8.171.47 - 7.741.33 - 7.01
48 teeth2.25 - 11.812.09 - 10.961.95 - 10.231.82 - 9.591.72 - 9.031.62 - 8.531.54 - 8.081.39 - 7.31
50 teeth2.34 - 12.302.17 - 11.422.03 - 10.661.90 - 9.991.79 - 9.411.69 - 8.881.60 - 8.421.45 - 7.61

Meters of Development - 29'' Wheels

Distance traveled per crank revolution with 29'' wheels (circumference 2.30 m). In the top row are the sprockets, in the left column the corresponding chainring. Details from-to in meters per crank revolution.

 13 teeth14 teeth15 teeth16 teeth17 teeth18 teeth19 teeth21 teeth
28 teeth  1.20 - 6.30     
30 teeth  1.28 - 6.751.20 - 6.33    
32 teeth  1.37 - 7.201.28 - 6.751.21 - 6.35   
34 teeth  1.45 - 7.651.36 - 7.171.28 - 6.751.21 - 6.37  
36 teeth  1.54 - 8.101.44 - 7.591.36 - 7.151.28 - 6.751.22 - 6.39 
38 teeth  1.63 - 8.551.52 - 8.011.43 - 7.541.35 - 7.121.28 - 6.75 
40 teeth1.97 - 10.38 1.71 - 9.001.60 - 8.441.51 - 7.941.43 - 7.501.35 - 7.101.22 - 6.43
42 teeth2.07 - 10.901.93 - 10.121.80 - 9.451.68 - 8.861.59 - 8.341.50 - 7.871.42 - 7.461.28 - 6.75
44 teeth2.17 - 11.422.02 - 10.601.88 - 9.901.76 - 9.281.66 - 8.731.57 - 8.251.49 - 7.811.34 - 7.07

Meters of Development - 26'' Fatbikes

Distance traveled per crank revolution with 26'' Fatbikes (circumference 2.32 m). In the top row are the sprockets, in the left column the corresponding chainring. Details from-to in meters per crank revolution.

 13 teeth14 teeth15 teeth16 teeth17 teeth18 teeth19 teeth21 teeth
28 teeth  1.21 - 6.35     
30 teeth  1.29 - 6.811.21 - 6.38    
32 teeth  1.38 - 7.261.29 - 6.811.22 - 6.41   
34 teeth  1.47 - 7.711.38 - 7.231.29 - 6.811.22 - 6.43  
36 teeth  1.55 - 8.171.46 - 7.661.37 - 7.211.29 - 6.811.23 - 6.45 
38 teeth  1.64 - 8.621.54 - 8.081.45 - 7.611.37 - 7.191.29 - 6.81 
40 teeth1.99 - 10.47 1.73 - 9.081.62 - 8.511.52 - 8.011.44 - 7.561.36 - 7.171.23 - 6.48
42 teeth2.09 - 11.001.94 - 10.211.81 - 9.531.70 - 8.931.60 - 8.411.51 - 7.941.43 - 7.521.29 - 6.81
44 teeth2.19 - 11.522.03 - 10.701.90 - 9.981.78 - 9.361.68 - 8.811.58 - 8.321.50 - 7.881.36 - 7.13
46 teeth2.29 - 12.042.13 - 11.181.98 - 10.441.86 - 9.781.75 - 9.211.65 - 8.701.57 - 8.241.42 - 7.46
48 teeth2.39 - 12.572.22 - 11.672.07 - 10.891.94 - 10.211.83 - 9.611.73 - 9.081.64 - 8.601.48 - 7.78

Derailleur gears in comparison to Rohloff SPEEDHUB

Smallest sprocket ratio of derailleur gears

Smallest sprocket ratio of derailleur gears Gear #1 Rohloff SPEEDHUB 500/14 sprocket ratio
22/40 28/15 32/16 34/17
24/40 32/15 34/16 36/17
26/42 34/15 36/16 38/17
20/34 32/15 34/16 36/17
22/34 34/15 38/16 40/17
24/34 38/15 40/16 44/17
26/34 42/15 44/16 46/17
20/32 34/15 36/16 38/17
22/32 36/15 40/16 42/17
24/32 40/15 44/16 46/17
26/32 44/15 46/16 50/17
20/30 36/15 38/16 40/17
22/30 40/15 42/16 44/17
24/30 44/15 46/16 48/17
26/30 46/15 50/16 52/17

Largest sprocket ratio of derailleur gears

Largest sprocket ratio of derailleur gears Gear #14 Rohloff SPEEDHUB 500/14 sprocket ratio
26/10 26/15 28/16 30/17
28/10 28/15 30/16 32/17
30/10 30/15 32/16 34/17
32/10 32/15 34/16 38/17
34/10 34/15 38/16 40/17
36/10 36/15 40/16 42/17
38/10 38/15 42/16 44/17
40/10 40/15 44/16 46/17
42/10 44/15 46/16 48/17
32/11 30/15 32/16 34/17
34/11 32/15 34/16 36/17
36/11 34/15 36/16 38/17
38/11 36/15 38/16 40/17
40/11 38/15 40/16 42/17
42/11 40/15 42/16 44/17
44/11 40/15 44/16 46/17
46/11 42/15 46/16 48/17
48/11 44/15 48/16 50/17
50/11 46/15 50/16 52/17
52/11 48/15 52/16 54/17
54/11 50/15 54/16 56/17
38/12 32/15 34/16 36/17
40/12 34/15 36/16 38/17
42/12 36/15 38/16 40/17
44/12 38/15 40/16 42/17
46/12 40/15 42/16 44/17
48/12 40/15 44/16 46/17
50/12 42/15 46/16 48/17
52/12 44/15 48/16 50/17
54/12 46/15 50/16 52/17

Chainring/sprocket Rohloff SPEEDHUB

Sprocket ratio (chainring/sprocket) Rohloff SPEEDHUB 500/14 Gear #1 resembles a derailleur gear sprocket ratio of Gear #14 resembles a derailleur gear sprocket ratio of
38/13 22/26 24/30 48/11 52/12
40/13 22/25 24/27 50/11 54/12
42/13 22/24 24/26 52/11 56/12
44/13 22/23 24/25 54/11 60/12
46/13 22/22 24/24 58/11 62/12
48/13 22/21 24/23 60/11 64/12
50/13 22/20 24/22 62/11 68/12
52/13 22/19 24/21 64/11 70/12
54/13 22/18 24/20 68/11 74/12
38/15 22/32 24/34 42/11 44/12
40/15 22/30 24/32 44/11 46/12
42/15 22/28 24/30 46/11 50/12
44/15 22/26 24/29 48/11 52/12
46/15 22/25 24/28 50/11 54/12
48/15 22/24 24/26 52/11 56/12
50/15 22/23 24/25 54/11 58/12
52/15 22/22 24/24 56/11 62/12
54/15 22/21 24/23 60/11 64/12
38/16 22/34 24/36 38/11 42/12
40/16 22/30 24/34 40/11 44/12
42/16 22/32 24/32 42/11 46/12
44/16 22/28 24/32 44/11 48/12
46/16 22/27 24/30 46/1150/12
48/16 22/26 24/28 48/11 52/12
50/16 22/25 24/27 50/11 56/12
52/16 22/24 24/26 52/11 58/12
54/16 22/23 24/25 54/11 60/12
40/17 22/34 24/36 38/11 42/12
42/17 22/32 24/34 40/11 44/12
44/17 22/30 24/34 42/11 46/12
46/17 22/29 24/32 44/11 48/12
48/17 22/27 24/30 46/11 50/12
50/17 22/26 24/29 48/11 52/12
52/17 22/25 24/28 50/11 54/12
54/17 22/24 24/27 52/11 56/12

Spoke lengths

Frame Spacing 135mm, 142mm, 148mm

32-hole Hub-shell Spoke lengths

*ERD: Effective Rim Diameter
Wheel Size Number of
Spoke Crosses 		ERD* 32-hole
Spoke lengths
18" 1 341-343 128
    344 130
20" 1 372-373 142
    374-377 144
    378-381 146
    382-385 148
    386-389 150
    390-394 152
24" 1 472-476 192
    477-480 194
    481-484 196
    485-489 198
    490-493 200
    494-497 202
    498-501 204
    502-503 206
26" 2 516-519 226
    520-523 228
    524-527 230
    528-531 232
    532-535 234
    536-539 236
    540-543 238
    544-547 240
    548-551 242
    552-555 244
650B 2X 556-559 246
    560-563 248
    564-567 250
    568-571 252
    572-575 254
    576-579 256
    580-583 258
28" 2 584-587 260
    588-592 262
    593-596 264
    597-600 266
    601-604 268
    605-608 270
29" 2 609-612 272
    613-616 274
    617-620 276
    621-624 278
    625-628 280
    629-632 282

36-hole Hub-shell Spoke lengths

*ERD: Effective Rim Diameter
Wheel Size Number of
Spoke Crosses 		ERD* 36-hole
Spoke lengths
18" 1 341-342 126
    343-344 128
20" 1 372-375 142
    376-379 144
    380-383 146
    384-387 148
    388-392 150
    393-396 152
24" 1 472-474 190
    475-478 192
    479-482 194
    483-486 196
    487-490 198
    491-494 200
    495-498 202
    499-502 204
    503 206
26" 2 516-517 222
    518-522 224
    523-526 226
    527-530 228
    531-534 230
    535-538 232
    539-542 234
    543-546 236
    547-550 238
    551-554 240
    555-558 242
    559-562 244
650B 2 563-566 246
    567-570 248
    571-574 250
    575-578 252
    579-582 254
28" 2 583-586 256
    587-590 258
    591-594 260
    595-598 262
    599-602 264
    603-607 266
29" 2 608-611 268
    612-615 270
    616-619 272
    620-623 274
    624-627 276
    628-631 278

Frame Spacing 170mm, 177mm, 190mm, 197mm

Spoke lengths for 32-hole XL/XXL (Fatbike) Hub-shells (min. 12.5mm nipple offset requried)

*ERD: Effective Rim Diameter
Wheel Size Number of
Spoke Chrosses 		ERD* 32-hole Spoke lengths
12,5 mm Offset 		32-hole Spoke lengths
20mm Offset
26" 2 516-519 228 226
    520-523 230 228
    524-527 232 230
    528-531 234 232
    532-535 236 234
    536-539 238 236
    540-544 240 238
    545-548 242 240
    549-552 244 242
    553-556 246 244
650B 2 557-560 248 246
    561-564 248-250 248
    565-568 250-252 250
    569-572 252-254 252
    573-576 254-256 254
    577-580 256-258 256
    581-584 258-260 258
    585-588 ✘ ✘
29" 2 589-592 ✘ ✘
    593-596 ✘ ✘
    597-600 ✘ ✘
    601-604 ✘ ✘
    605-608 ✘ ✘

Torques and tools

Name Item no. Tightening torque Type Tool Assembly group
Axle plate screws 8236 3Nm / 26.55in-lbs M4x25 TX20 (Art.-No. 8504) Axle-plate
Hub cap screws 8237 3Nm / 26.55in-lbs M4x10 TX20 (Art.-No. 8504) Hubcap
Cable box screws 8237 3Nm / 26.55in-lbs M4x10 TX20 (Art.-No. 8504) External Gear Mech
Set shifting box bolt with threaded bush 8215 3Nm / 26.55in-lbs M4 TX20 (Art.-No. 8504) External Gear Mech
Twist shifter cable stopper screws 8203 3Nm / 26.55in-lbs M4x16 TX20 (Art.-No. 8504) Twist shifter (old)
TX20 screws for clamp 8192 2Nm / 17.7in-lbs M3x12 TX20 (Art.-No. 8504) Twist shifter
Screws stop pin ---- 3Nm / 26.55in-lbs M4x10 TX20 (Art.-No. 8504) Chain Tensioner
Tension rollers Axle bolt ---- 3Nm / 26.55in-lbs M4 TX20 (Art.-No. 8504) Chain Tensioner
Screw rear spacer bushing ---- 3Nm / 26.55in-lbs M4x20 TX20 (Art.-No. 8504) Chain Guide CC
Screw rear threaded bush ---- 3Nm / 26.55in-lbs M4x20 TX20 (Art.-No. 8504) Chain Guide CC
Screw front spacer bushing ---- 3Nm / 26.55in-lbs M4x35 TX20 (Art.-No. 8504) Chain Guide CC
Clamps screws ---- 3Nm / 26.55in-lbs M4x35 TX20 (Art.-No. 8504) Chain Guide CC
Grub screw bayonet connectors 8570 1,5Nm / 13.28in-lbs M4x4 Allen key SW2 Internal Gear Mech
Cable pulley screws 8570 1,5Nm / 13.28in-lbs M4x4 Allen key SW2 External Gear Mech
Mounting screws ---- 1,5Nm / 13.28in-lbs M4x8 Allen key SW2 Chain guide DH
Twist shifter clamp screws 8204 1Nm / 8.85in-lbs M4x8 Allen key SW2,5 Twist shifter (old)
Drain screw 8205 0,5Nm / 4.43in-lbs ---- Allen key SW3 Oil change kit
Mounting screws ---- 6Nm / 53.1in-lbs M6 Allen key SW4 Cable Guide
Clamp 8241 6Nm / 53.1in-lbs M6x12 Allen key SW4 Torque Arm
Mounting screws ---- ---- M6x25 Allen key SW4 SPEEDBONE/Monkey Bone
Torque Arm screws with washers 8231 7Nm / 61.96in-lbs M8 Allen key SW5 Torque Arm
Disc brake mounting bolts 8214 10Nm / 88.51in-lbs M8x0,75 Allen key SW5 Disc
Chain tensioner bolt long with washers 8257 8Nm / 70.81in-lbs M8 Allen key SW5 Chain Tensioner + DH Chain Tensioner
Lock-Ring 8538 and 8540L 30Nm / 265.52in-lbs   Lock-Ring Tool (Art.-No. 8518) Splined Carrier L