Technical Data

What you can expect to find on this page

Here you will find an overview of the most important facts and figures. In addition, the weight and efficiency of the SPEEDHUB are compared with that of a derailleur system. Finally, you will learn how to calculate the sprocket ratios.

Figures

Subject to technical changes. Status: 03/2021
SPEEDHUB 500/14 for 135mm A12-142mm A12-148mm
Number of gears 14 14 14
Gear increases even 13.6 % even 13.6 % even 13.6 %
Range of gears 526 % 526 % 526 %
Frame spacing/ O.L.D. 135mm 142mm 148mm (BOOST)
Number of spoke holes 32/36 32/36 32/36
Spoke flange distance 58 mm, symmetrical 58 mm, symmetrical 58 mm, symmetrical
Spoke hole circle diameter Ø 100 mm Ø 100 mm Ø 100 mm
Spoke hole diameter Ø 2.7 mm Ø 2.7 mm Ø 2.7 mm
Spoke flange width 3.2 mm 3.2 mm 3.2 mm
Axle diameter at dropout 9.8 mm with Adapter 12mm /7mm with Adapter 12mm /7mm
Axle overall width CC 147 mm 149mm 155mm
Hollow axle inner diameter CC Ø 5.5 mm, for quick release lever for M7 securing bolts for M7 securing bolts
Total axle width TS 171mm/TS long 179mm
Axle thread TS M10x1
Center disc mounting diameter Ø 52 mm Ø 52 mm Ø 52 mm
Mounting bolt hole circle diameter Ø 65 mm Ø 65 mm Ø 65 mm
Brake disc mounting bolts 4 x M8x0.75 4 x M8x0.75 4 x M8x0.75
Distance between dropout and center disc mount 16,3 mm (IS 1999) 16,3 mm (IS 1999) 16,3 mm (IS 1999)
Weight 1700g (CC), 1800g (CC EX), 1825g (CC DB)    
Oil volume 25ml max. 25ml max. 25ml max.
Sprocket thread M34x6 P1, tolerance 6H M34x6 P1, tolerance 6H M34x6 P1, tolerance 6H
Sprocket type for bicycle chain 1/2" x 3/32” (ISO No. 082) for bicycle chain 1/2" x 3/32” (ISO No. 082) for bicycle chain 1/2" x 3/32” (ISO No. 082)
Number of sprocket teeth 16 (optional: 13, 15, 17 threaded- or 13-19 + 21 splined-spocket) 16 (optional: 13, 15, 17 threaded- or 13-19 + 21 splined-spocket) 16 (optional: 13, 15, 17 threaded- or 13-19 + 21 splined-spocket)
Chainline (Threaded Sprocket) 54mm (57mm with 13T Sprocket) 54mm (57mm with 13T Sprocket) 51mm (55mm with 13T Sprocket)
Smallest permissible gear ratios (Riders up to 100kg) 40/21, 36/19, 34/18, 32/17, 30/16, 28/15 (transm.- factor ~ 1.90) 40/21, 36/19, 34/18, 32/17, 30/16, 28/15 (transm.- factor ~ 1.90) 40/21, 36/19, 34/18, 32/17, 30/16, 28/15 (transm.- factor ~ 1.90)
(Riders over 100kg/tandem) 53/21, 48/19, 45/18, 42/17, 40/16, 38/15 (transm.-factor ~ 2.50) 53/21, 48/19, 45/18, 42/17, 40/16, 38/15 (transm.-factor ~ 2.50) 53/21, 48/19, 45/18, 42/17, 40/16, 38/15 (transm.-factor ~ 2.50)
Beltline - Gates Carbon Drive - with Threaded Carrier (8224) 55mm 55mm 52mm
Beltline - Gates Carbon Drive - with Splined Lock-ring Carrier (8540L) 55mm 55mm 52mm
Beltline - Gates Carbon Drive - with Slim Splined Lock-ring Carrier (8540sL) 53mm 53mm 50mm
Smallest permissible belt sprocket ratios (26”) Gates Drive 39/19, 39/20, 42/22, 46/24 (transmission factor ~ 1.90) 39/19, 39/20, 42/22, 46/24 (transmission factor ~ 1.90) 39/19, 39/20, 42/22, 46/24 (transmission factor ~ 1.90)
(Riders over 100kg/tandem) Gates Drive 46/19, 50/20, 55/22, 60/24 (transmission factor ~ 2.50) 46/19, 50/20, 55/22, 60/24 (transmission factor ~ 2.50) 46/19, 50/20, 55/22, 60/24 (transmission factor ~ 2.50)
Maximum input torque 130 Nm 130 Nm 130 Nm
Gear control by twist shifter (version right or left) by twist shifter (version right or left) by twist shifter (version right or left)
Twist shifter angle per gear change/over all 21°/273° 21°/273° 21°/273°
Gear control transfer via two shifter cables (pull-pull system) via two shifter cables (pull-pull system) via two shifter cables (pull-pull system)
Shifter cable movement per gear change 7.4 mm/96.2 mm 7.4 mm/96.2 mm 7.4 mm/96.2 mm

Specifications for Fatbikes

Subject to technical changes. Status: 03/2021
SPEEDHUB 500/14 XL for 170mm Fatbike XL for A12-177mm Fatbike XXL for 190mm Fatbike XXL for A12-197mm Fatbike
Number of gears 14 14 14 14
Gear increments even 13,6% even 13,6% even 13,6% even 13,6%
Range of gears 526% 526% 526% 526%
Frame spacing/ O.L.D. 170mm 177mm 190mm 197mm
Number of spoke holes 32 32 32 32
Spoke flange spacing 93mm, symmetrical 93mm, symmetrical 93mm, symmetrical 93mm, symmetrical
Spoke hole circle diameter Ø 100mm Ø 100mm Ø 100mm Ø 100mm
Spoke hole diameter Ø 2,7mm Ø 2,7mm Ø 2,7mm Ø 2,7mm
Spoke flange width 3,2mm 3,2mm 3,2mm 3,2mm
Axle diameter at dropout 9,8mm with Adapter 12mm /7mm 9,8mm with Adapter 12mm /7mm
Axle overall width CC 182mm 184mm 202mm 204mm
Hollow axle inner diameter CC Ø5,5mm, for quick release lever for M7 securing bolts Ø5,5mm, for quick release lever for M7 securing bolts
Total axle width TS 206mm (bei langen Achszapfen 214mm)
Axle thread TS M10x1
Center disc mounting diameter Ø52mm Ø52mm Ø52mm Ø52mm
Mounting bolt hole circle diameter Ø65mm Ø65mm Ø65mm Ø65mm
Brake disc mounting bolts 4 x M8x0,75 4 x M8x0,75 4 x M8x0,75 4 x M8x0,75
Distance between dropout and center disc mount 16,3mm (IS 1999) 16,3mm (IS 1999) 26,3mm (with Fatbone/ Monkeybone-10) 26,3mm (with Fatbone/ Monkeybone-10)
Weight 1980g (CC DB)   1995g (CC DB OEM2)  
Oil volume 25ml max. 25ml max. 25ml max. 25ml max.
Sprocket thread M34x6 P1, tolerance 6H M34x6 P1, tolerance 6H M34x6 P1, tolerance 6H M34x6 P1, tolerance 6H
Sprocket type for bicycle chain 1/2" x 3/32" (ISO Nr. 082) for bicycle chain 1/2" x 3/32" (ISO Nr. 082) for bicycle chain 1/2" x 3/32" (ISO Nr. 082) for bicycle chain 1/2" x 3/32" (ISO Nr. 082)
Number of sprocket teeth 16 (optional: 13, 15 and 17) 16 (optional: 13, 15 and 17) 16 (optional: 13, 15 and 17) 16 (optional: 13, 15 and 17)
Chainline (Threaded Sprocket) 71,5mm(75mm with 13T sprocket) 71,5mm(75mm with 13T sprocket) 71,5 mm (75mm with 13T sprocket) 71,5 mm (75mm with 13T sprocket)
Chainline (Splined Sprocket) 75,5mm 75,5mm 75,5mm 75,5mm
Smallest permissible gear ratios (Riders up to 100kg) Chain 40/21, 36/19, 34/18, 32/17, 30/16, 28/15 (transmission factor ~1,9) 40/21, 36/19, 34/18, 32/17, 30/16, 28/15 (transmission factor ~1,9) 40/21, 36/19, 34/18, 32/17, 30/16, 28/15 (transmission factor ~1,9) 40/21, 36/19, 34/18, 32/17, 30/16, 28/15 (transmission factor ~1,9)
(Riders over 100kg/tandem) Chain 42/17, 40/16, 38/15 (transmission factor ~2,50) XL authorized for tandem use 42/17, 40/16, 38/15 (transmission factor ~2,50) XL authorized for tandem use 42/17, 40/16, 38/15 (transmission factor ~2,50) XXL authorized for tandem use 42/17, 40/16, 38/15 (transmission factor ~2,50) XXL authorized for tandem use
Beltline Gates Carbondrive beltline 72,25mm 72,25mm 72,25mm 72,25mm
Smallest permissible belt sprocket ratios (26”) Gates Drive 39/19, 39/20, 42/22, 46/24 (transmission factor ~1,9) 39/19, 39/20, 42/22, 46/24 (transmission factor ~1,9) 39/19, 39/20, 42/22, 46/24 (transmission factor ~1,9) 39/19, 39/20, 42/22, 46/24 (transmission factor ~1,9)
(Riders over 100kg/tandem) Gates Drive 46/19, 50/20, 55/22, 60/24 (transmission factor ~2,50) XL authorized for tandem use 46/19, 50/20, 55/22, 60/24 (transmission factor ~2,50) XL authorized for tandem use 46/19, 50/20, 55/22, 60/24 (transmission factor ~2,50) XXL authorized for tandem use 46/19, 50/20, 55/22, 60/24 (transmission factor ~2,50) XXL authorized for tandem use
Maximum input torque 130Nm 130Nm 130Nm 130Nm
Gear control by twist shifter (version right or left) by twist shifter (version right or left) by twist shifter (version right or left) by twist shifter (version right or left)
Twist shifter angle per gear change/over all 21°/273° 21°/273° 21°/273° 21°/273°
Gear control transfer via two shifter cables (pull-pull system) via two shifter cables (pull-pull system) via two shifter cables (pull-pull system) via two shifter cables (pull-pull system)
Shifter cable movement per gear change/over all 7,4mm/96,2mm 7,4mm/96,2mm 7,4mm/96,2mm 7,4mm/96,2mm

Weight Comparison

The Rohloff SPEEDHUB 500/14 is with a weight of 120g per gear, the lightest gear hub on the market. The gear range is the same as high quality 27 gear derailleur systems due to the 14 gears within the hub being evenly spaced out at 13.6% increases.

With the Rohloff SPEEDHUB 500/14 there is no longer a need for the following parts:

  • Front and rear derailleur 
  • Two shifters including
  • Rear hub with Cassette
  • Small and middle chainrings
  • The total average weight of all these components is approx. 1600g.

The weight of a fitted Rohloff SPEEDHUB 500/14 CC OEM including twist shifter, shifter cables and cable guide is approx. 1820g.

The comparison between the Rohloff SPEEDHUB 500/14 and the derailleur system shows only a slight increase in weight. For that, the user receives a:

  • Service-free,
  • dirt-free full-encapsulated,
  • user-friendly gear system and
  • high reliability
  • alongwith a long life span.

Comparison of Mechanical Efficiency

The mechanical efficiency* and consequently the size of the loss of the Rohloff SPEEDHUB 500/14 is entirely comparable with that of the derailleur system.

The losses of a derailleur system consist of the friction caused by the bottom bracket, chain, cassette and the hub bearings. The amount of friction loss depends on the size of the sprockets, the angle of the chain line and condition of wear. In reality this proves to be 1 - 5%, leaving the derailleur system with a working efficiency lying between 95% and 99%.

The losses of the Rohloff SPEEDHUB 500/14 are caused by the fricion coming from the bottom bracket, chain and gearbox. Here, however, the chain runs in a straight line from just one chainring reducing sideways friction on the sprockets. Most of the friction occurs when all the planetary gear sets are used within the gearbox. The overall average loss of the gears within the Rohloff SPEEDHUB 500/14 is approximately 1 - 5%, leaving the working efficiency between 95% and 99%.

The Rohloff SPEEDHUB 500/14 is, therefore, consequently an optimum choice for the everyday and sports rider.

* More detailed info over the working efficiency is to be found here

Sprocket Ratios

The Rohloff SPEEDHUB 500/14 has a 526% range of gears, that means gear #14 is 5.26 times greater than gear #1. The 14 gears are evenly spaced out over this range in 13.6% increases. Through the choice of chainring and sprocket in use, the Rohloff SPEEDHUB 500/14 can be tuned for the specific riding purpose. The Rohloff SPEEDHUB 500/14 comes standard with a 16 tooth sprocket. 13-19 + 21tooth sprockets are available as alternatives.

In the gear-meters tables the distance travelled per crank revolution is listed for gears #1 and #14. The listed distance travelled per crank revolution is shown in the tables for a variety of sprocket ratios and wheel sizes (20", 26" and 28" wheels).

When the particular wheel/sprocket/chainring size and gear is not listed in the tables, then the following formula can be used to calculate the exact distance travelled per crank revolution of the Rohloff SPEEDHUB 500/14:

Distance travelled per crank revolution  = W · C / S · IGR

with

W = Wheel circumference
C = Chainring size
S = Sprocket size
IGR = Inner gear ratio listed in the following table

Inner gear ratio IGR = hub revolutions per sprocket revolutions of the Rohloff SPEEDHUB 500/14

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

The tables linked here or the following formula can be used to compare the Rohloff SPEEDHUB 500/14 to a derailleur gear system
Ratio of the derailleur gear system  = C / S
Ratio of the Rohloff SPEEDHUB 500/14= IGR · C / S

Smallest Permissible Sprocket Ratios (solo 100kg)

The sprocket ratio on the Rohloff SPEEDHUB 500/14 (e.g. 42:16) converts the slow rotational speed at the crank, into a fast rotational speed at the sprocket and reduces the input torque for the Rohloff SPEEDHUB 500/14 in the same proportion.

To prevent overstraining the hub, a minimum sprocket factor of 1.90 must be upheld. With the available sprockets, these minumum ratios are achieved with: 53:21, 48:19,  45:18, 42:17, 40:16, 38:15.

These primary transmisison ratios resemble a singlespeed transmission of 22:40. Larger chainrings can be used without any exceptions.

Attention

The following sprocket ratios must not be undercut if the SPEEDHUB is used by a rider weighing more than 100kg, or mounted on a tandem application:  53:21, 48:19,  45:18, 42:17, 40:16, 38:15
This equates to a transmission factor of 2.50.