shimano nexus nexis 8 speed eight internal gear gearing hub hub gears internal 8 speed 8speed 7 speed 4 speeds 3
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Shimano Nexus & Alfine Internal Gear Hubs:

8-speed  |  7-speed | 3-speed | Complete Bikes | Shifters | Sprockets | Washers & Parts

 

Shimano 8-speed Hubs

Shimano 8-speed hubs provide the following gear ratios:

81.615:1
71.419:1
61.223:1
51:1
40.851:1
30.748:1
20.644:1
10.527:1

Shimano Alfine 8-speed disc brakes compatible hubs!

DESCRIPTIONDESCRIPTION
Alfine Hubs (Parts kit is included)
We have been very well impressed with the Shimano Nexus 8-speed internal gear hubs, and have sold a lot of them, both the basic model and the deluxe "red band" version.

These have been the best-shifting bicycle gear shift system ever, and have a range of gears that is adequate for most applications.

We're excited to announce the new super-deluxe "Alfine" 8-speed, which builds upon the foundation of the Nexus 8. The Alfine version includes several improvemnts:


HUH215 Alfine SG-S501 32 Hole Silver   $289.95 buy button

HUH217 Alfine SG-S501 36 Hole Silver   $289.95 $279.95 buy button

HUH218 Alfine SG-S501 36 Hole Black   $289.95 $279.95 buy button

Note: The 36 hole hubs are now coming bulk-packed from our supplier. They may have a few minor cosmetic blemishes (a nick or scratch).
The price has been adjusted accordingly.

The new Alfine SG-S501 8 speed internal gear hub features triple roller clutch engagement for the smoothest shifting yet!


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HUH19 Nexus 8 Speed Premium "Red Band" Hub

We are currently not stocking this hub.

The premium "Red Band" model is lighter and has improved bearings compared with the SG-8R20 version.
Includes 19 tooth sprocket. Other sizes are available. (see Related items). Complete parts kit included.
Shifter sold separately

36 holes only.

DESCRIPTION

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Optional Rollerbrake ® BRC99 $28.95 buy button

This hand-operated drum brake fits Nexus and Nexave rear hubs with brake splines.

Not recommended for mountainous terrain.

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  Shimano Alfine Push Button Shifter

Alfine RapidFire Shifter LD825 $41.95 buy button

Shimano Nexus 8-speed grip shifter

Nexus 8 Twist Shifter LD822 $24.95 buy button

These, and the new Jtek model (below), are the ONLY compatible shifters currently available.
Both shifters will work with either hub. Cable and cable anchor assembly included with either model.

Twist Shifters and Drop Handlebars.

The Nexus and Alfine 8 hubs work only with shifters made for them.

The Shimano Nexus and Alfine shifters are designed to fit straight handlebars with a 7/8" (22.2 mm diameter.) This includes basically all upright or "mountain bike" type handlebars, but does not include drop bars as used on most touring bikes.

There are several ways to get around this limitation however:

 

LD839 Jtek 8 Speed Bar-End Shifter
For Nexus & Alfine - These will be back in stock soon! buy button

Finally a shifting solution for people who want to use Shimano internal hubs with drop handlebars. This shifters is compatible with Shimano 8-speed Alfine & Nexus hubs. It features a clamp-on mounting design which will fit standard diameter 24mm handle bars.

  • Super light weight only 64 grams making it the lightest bar-end shifter on the market!
  • 24mm clamp-on design. Easy installation eliminates the need for disassembly to install
  • High quality CNC precision machined parts, 100% made in Hugo, MN.
  • 8-speed indexing
  • Cable anchor unit included

  • DESCRIPTION

     

    LD103 HubBub Bar End Adpaptor $54.95 buy button

    This is a very nicely made extension that fits into the end of your drop handlebar. It uses the same mounting hardware as Shiman bar-end shifters. The position is quite convenient. If you wish, you can cut the bar itself shorter on this side.

    If you are handy, here are a couple of alternatives:

    DESCRIPTION

    Nexus 8 Pre Built Wheels

    Click here for details.

    Anti-rotation (non-turn) Washers

    DESCRIPTION
    Internal gear hubs always require some system for preventing the axle from rotating, as it is used as part of the gear train. Like most other internal gear systems, Shimano uses tab washers that engage the dropout slot to keep the axle from turning.

    Because the shift cable linkage ("cassette joint unit" in Shimano-speak) is also keyed to the axle, they make different types of anti-rotation washers to fit different dropout angles. You need to select the correct type of washers for your particular frame.

    (Earlier Nexus hubs only used an anti-roatation washer on the right side, but newer models use a pair of them, each a mirror image of the other.)

    The washers are color coded as shown in the chart.

    Vertical Dropout Issues

    The Nexus hubs were not originally intended for use with bikes that have vertical dropouts. The anti-rotation washers provided with the hub have the wrong orientation for use with vertical dropouts, and originally, Shimano said they could not be used with vertical dropouts.

    Shimano has reconsidered, however, and now makes available an optional set of anti-rotation washers that work with vertical dropouts. Note that you will need either a pulley-type chain tensioner (or a rear derailer) or an eccentric bottom bracket, because vertical dropouts do not permit moving the axle back and forth to adjust the chain tension.

    Shallow Dropouts (20 ° or less) 5R/Yellow, 5L/Brown$12.95/pair buy button
    Shallow Dropouts (38 ° or less) 7R/Black, 7L/Gray$12.95/pair buy button
    Track-type fork ends (0 °) 6R/Siler, 6L/White$12.95/pair buy button
    Vertical Dropouts (60-90 °) 8R/Blue, 8L/Green$12.95/pair buy button

    Shimano Nexus Anti Rotation Washers
     

    HUH030 Cable Anchor Bolt $3.95

    buy button

    Works with Alfine or Nexus (7 or 8 speed) hubs.
    Sits in cassette joint.
     

    HUH031 Nexus 8 Speed Cassette Joint $14.95

    buy button

    The Cassette Joint is the shift cable linkage unit.
    Fixing ring included.
    Click here for cable installation info.
    DESCRIPTION
     

    HUH033 Nexus 8 Fixing Ring
    Included with Cassette Joint. Not available separately.

    The Fixing Ring locks the cassette joint onto the hub.
    It is sold separately from the cassette joint.

    DESCRIPTION

    Sprockets ("Cogs")

    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 #DescriptionWidthPrice (each)
    Sturmey-ArcherHUH056Nexus Sprocket 16T 3/32" (narrow)$14.95    buy button
    Sturmey-ArcherHUH058Nexus Sprocket 18T 3/32" (narrow)$14.95    buy button
    Sturmey-ArcherHUH059Nexus Sprocket 19T 3/32" (narrow)$14.95    buy button
    Sturmey-ArcherHUH060Nexus Sprocket 20T 3/32" (narrow)$14.95    buy button
    Sturmey-ArcherHUH061Nexus Sprocket 21T 3/32" (narrow)$14.95   buy button
    Sturmey-ArcherHUH062Nexus Sprocket 22T 3/32" (narrow)$14.95    buy button
    Sturmey-ArcherHUH063Nexus Sprocket 23T 3/32" (narrow)$14.95    buy button

    Shimano Nexus 8-speed Hub Dimensions

    Click here for Nexus 8-speed Service Manual

    Sheldon Brown's Internal Gear Calculator for Internal Gear Hubs

    Wheel Size
    Crank Length
    Gear units
    Chainring Size(s)
    Rear Sprocket Size
    Internal Hub
    Spoke Divider

    Gain Ratios

    Gear Inches

    Meters Development

      Nexus Hub Cutaway
    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:

    1st17.2%2nd13.8%3rd17.3%4th15.8%5th16.6%6th15.7%7th

    For comparison, your old 3-speed had a range of 177%, in jumps of:

    1st33%2nd33%3rd

    A typical 1970's "10 speed" had 8 usable gears, a range of 247%:

    42/2816.6%42/2420.0%42/203.1%52/2414.0%42/175.2%52/2017.7%52/1721.3%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.

     
    Shimano Nexus 7 speed hubs.
    (See below for sprockets)
    36 holes. Shifter not included!
    ShimanoNexus 7 speed(Coaster Brake)$229.95 buy button19 tooth130 mm spacing
    ShimanoNexus 7 speed(Rollerbrake®)$219.95 buy button19 tooth130 mm spacing
    Shimano7-speed RapidFire Shifter for Nexus hubsLD741 $34.95 buy button Shimano Nexus 7-speed Rapid Fire Shifter
    Shimano7-speed Revo Twist Shifter for Nexus hubsLD742 $27.95 buy button Shimano Nexus 7-speed Rapid Fire Shifter
    Shimano Nexus 4 speed hubs.

    Sorry, these hubs are discontinued, no longer available.  

    Shimano Nexus Inter 3 speed hubs.
    Shimano SG-3C41Inter 3 speed(Coaster Brake)HUH13 $85.95 buy buttonShimano Nexus 7-speed Rapid Fire Shifter
    120 mmspacing
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    Nexus Technical Page

    DESCRIPTION

    Click here for Shimano Nexus lubricants.

    The official Shimano Nexus page

      Spoke Divider

    We carry Nexus-equipped bicycles
    from several manufacturers, including:

    Harris Cyclery's Exclusive Bianchi San Jos8

    Breezer models with 8-speed, 7-speed, and 3-speed Nexus hubs

    NEW! Jamis Commuter 3.0 An affordable, well-equipped commuter bike

    Bianchi Milano with the new 8-speed Nexus hub

    Come on in and test ride one soon,
    here or at your local dealer...
    you're in for a pleasant surprise!
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    See also my article on Internal Gear Hubs.

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    New! On-line Gear Calculator for Internally-Geared Hubs

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    Custom Wheelbuilding

    Wheels hand-built by Harris Cyclery

    We build custom wheels, with care and attention to detail. Standard charges:
    DT certified wheelbuilder

    • $40 each for wheels with 36 or fewer spokes.
    • $45 for 40 spoke wheels.
    • $50 for 48 spoke wheels.
    • $10 for cutting out and prepping a used hub.
    • Butted spokes (DT or Wheelsmith) $1.00 each.
    We will re-use your old hubs if you wish, but will not use used spokes nor rims.

    If you bring in existing wheels to be rebuilt, add $10 per wheel for cutting the old spokes, cleaning and prepping your hub.

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