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Shimano Nexus Internal Gear Hubs:

Sprockets | Sheldon's Internal Gear Calculator

 

Shimano Nexus Inter 3 speed hubs.
Shimano SG-3C41	Inter 3 speed with Coaster Brake Includes parts kit sprocket Shifter included 36 Hole 120 mm spacing	HUH13 $85.95

Pre-Built Wheel w/Alfine 8 Speed Hub. Click here for details.

Sprockets ("Cogs") $14.95 each All Shimano internal-gear hubs use standard 3-spline sprockets, same as most other internal gear and coaster brake hubs. In addition to the genuine Shimano Nexus (works with Alfine too) sprockets, that will work with either 1/8" or 3/32" chains, we also can supply most sizes in the Sturmey-Archer version, which is for 1/8" (wide) chains only. Note that the Nexus and Alfine hubs require a dished sprocket, so sizes smaller than 16 teeth are not suitable for this application. Part # Description Width HUH056 Nexus Sprocket 16T 3/32" (narrow) HUH058 Nexus Sprocket 18T 3/32" (narrow) HUH059 Nexus Sprocket 19T 3/32" (narrow) HUH060 Nexus Sprocket 20T 3/32" (narrow) HUH061 Nexus Sprocket 21T 3/32" (narrow) HUH062 Nexus Sprocket 22T 3/32" (narrow) HUH063 Nexus Sprocket 23T 3/32" (narrow) Sheldon Brown's Internal Gear Calculator for Internal Gear Hubs Wheel Size 27 inch (nominal) 26 inch (nominal) 700 X 56 / 56-622 700 X 50 / 50-622 700 X 44 / 44-622 700 X 38 / 38-622 700 X 35 / 35-622 700 X 32 / 32-622 700 X 28 / 28-622 700 X 25 / 25-622 700 X 23 / 23-622 700 X 20 / 20-622 Tubular / Wide Tubular / Narrow 27 X 1 3/8 / 35-630 27 X 1 1/4 / 32-630 27 X 1 1/8 / 28-630 27 X 1 / 25-630 26 X 2.35 / 60-559 / MTB 26 X 2.125 / 54-559 / MTB 26 X 1.9 / 47-559 / MTB 26 X 1.5 / 38-559 / MTB 26 X 1.25 / 32-559 / MTB 26 X 1.0 / 25-559 / MTB 650 x 38b / 38-584 650B 650 x 28C / 28-571 / 26" road/tri 650 x 25C / 25-571 / 26" road/tri 650 x 23C / 23-571 / 26" road/tri 26 X 1 3/8 / 35-590 24 inch (nominal) 24 x 1 / 25-520 20 inch (nominal) 20 X 1.75 / 44-406 / BMX 20 X 1 1/4 / 28-451 18 x 1.5 / 40-355 17 x 1 1/4 / 28-369 16 x 1 3/8 / 35-349 16 x 1.5 / 37-305 Crank Length 150 mm 152 mm 155 mm 160 mm 162.5 mm 165 mm 167.5 mm 170 mm 172.5 mm 175 mm 177.5 mm 180 mm 185 mm 190 mm Gear units Gain Ratios Gear inches Meters Developement MPH @ 40 RPM MPH @ 60 RPM MPH @ 80 RPM MPH @ 100 RPM MPH @ 120 RPM KPH @ 40 RPM KPH @ 60 RPM KPH @ 80 RPM KPH @ 100 RPM KPH @ 120 RPM Chainring Size(s) Rear Sprocket Size Internal Hub Shimano Nexus 8-speed Rohloff Speedhub 14-speed Shimano Nexus 7-speed Shimano Nexus 4-speed Shimano Nexus Inter-3 SRAM/Sachs Spectro new-style 7-speed SRAM/Sachs/Torpedo old-style 7-speed SRAM/Sachs/Torpedo 5-speed SRAM/Sachs/Torpedo 3-speed, including 3 x 7 SRAM/Sachs Elan 12-speed Sturmey-Archer 8-speed Sturmey-Archer AB wide-ratio 3-speed w/brake Sturmey-Archer AC close-ratio 3-speed Sturmey-Archer AF close-ratio 4-speed Sturmey-Archer AM medium-ratio 3-speed Sturmey-Archer AG wide-ratio 3-speed w/dyno Sturmey-Archer AG wide-ratio 3-speed w/dyno Sturmey-Archer AR ultra-close-ratio 3-speed Sturmey-Archer ASC fixed close-ratio 3-speed Sturmey-Archer AT3 wide-ratio 3-speed Sturmey-Archer AW wide-ratio 3-speed Sturmey-Archer AWC wide-ratio 3-speed w/coaster brake Sturmey-Archer FB wide-ratio 4-speed w/brake Sturmey-Archer FC close-ratio 4-speed Sturmey-Archer FG wide-ratio 4-speed w/dyno Sturmey-Archer FM medium-ratio 4-speed Sturmey-Archer FM modified to 5-speed Sturmey-Archer FW wide-ratio 4-speed Sturmey-Archer K, KB, KBC, KT, KTC wide-ratio 3-speed Sturmey-Archer KS close-ratio 3-speed Sturmey-Archer KSW medium-ratio 3-speed Sturmey-Archer S3C wide-ratio 3-speed w/coaster Sturmey-Archer SBR wide-ratio 3-speed w/brake Sturmey-Archer S5 5-speed Sturmey-Archer Sprinter 5-speed Sturmey-Archer Sprinter 7-speed Sturmey-Archer SW super-wide-ratio 3-speed Sturmey-Archer T,TB,TBC,TBF,TBFC,TF wide-ratio 2-speed Sturmey-Archer TC close-ratio 2-speed Sturmey-Archer TCW wide-ratio 3-speed w/coaster Gain Ratios Gear Inches Meters Development   Planetary Gears Are Back! Did You Ever Have A Three-Speed? Do you remember how easily it shifted, even when you were stopped for a traffic light? Do you remember how trouble-free it was? Do you remember how the chain never fell off? Do you remember how weather-proof the gear system was? Do you remember how comfortable it was? But... You also probably remember the narrow range of gears, and the big jumps in between. You probably remember the gap between gears, where your feet would spin freely, with no result. You probably also remember how heavy your old "all steel" bicycle was, and how badly the brakes worked in the rain... The Good Without The Bad! The Shimano Nexus group combines the best features of your old 3 speed, and eliminates the worst, thanks to modern materials and technology. Nexus is a family of parts, but the most exciting part is the Nexus Inter 7 seven speed hub. Shimano Nexus 7-speed hub New! On-line Gear Calculator for Internally-Geared Hubs The overall range is 244%, in jumps of: 1st 17.2% 2nd 13.8% 3rd 17.3% 4th 15.8% 5th 16.6% 6th 15.7% 7th For comparison, your old 3-speed had a range of 177%, in jumps of: 1st 33% 2nd 33% 3rd A typical 1970's "10 speed" had 8 usable gears, a range of 247%: 42/28 16.6% 42/24 20.0% 42/20 3.1% 52/24 14.0% 42/17 5.2% 52/20 17.7% 52/17 21.3% 52/14 Other features of the Nexus system: Nexus 7-speed internal gear systems also incorporate all-weather braking systems. They are available in two forms: Coaster (back-pedaling) brake or Hand operated "Rollerbrake ®" at the rear hub. Both of these systems provide quite a good rear brake, which works as well in rain and snow as it does on a sunny spring afternoon. There is also a front roller brake available, but, in my opinion, a conventional cantilever brake is better for the front. We would not particularly recommend the Nexus front brake. Click here for Shimano Nexus lubricants. See also my article on Internal Gear Hubs. New! On-line Gear Calculator for Internally-Geared Hubs Custom Wheelbuilding Wheels hand-built by Harris Cyclery We build custom wheels, with care and attention to detail. Back to the Harris Cyclery Home Page Articles by Sheldon Brown and others Harris Home Beginners Brakes Commuting Lights Cycle- Computers Do-It- Yourself Essays Family Cycling Fixed Gear Singlespeed Frames Gears & Drivetrain Bicycle Humor Bicycle Glossary Bicycle Links Old Bikes Repair Tips Tandems Touring What's New Wheels Sheldon Brown Web site by Sheldon Brown Sheldon Brown's Hotlists If you would like to make a link or bookmark to this page, the URL is: http://harriscyclery.com/shimano-nexus.htm Copyright © 2005, 2008, 2010, 2011, 2012 Harris Cyclery