Shimano Alfine SG S7001 8 SPD Intertnal Centerlock Rear Hub
The Shimano Alfine SG-S7001-8 is the 8-speed internal-gear hub: eight gears inside the hub shell with a 307% range, shifted by a single cable, taking a chain or a Gates belt, with a centerlock disc mount, 135mm quick-release spacing and 32 and 36 hole drilling. It is simpler and cheaper than the Alfine 11 and it is the hub we build for commuter and city bikes that want to be clean and low-maintenance without paying for eleven gears. This page covers the Shimano Alfine SG S7001 8 SPD Intertnal Centerlock Rear Hub.
The Alfine 8 comes from us only as a finished wheel: pick the rim, spokes and nipples, and we lace, tension and true it by hand in Georgia before it ships.
Design and construction
An internal-gear hub is a planetary gearbox inside the hub shell: a set of sun and planet gears that the shifter engages in different combinations to give eleven ratios from a single sprocket. The Alfine 11 runs its gears in an oil bath rather than grease, which makes it smoother and longer-lived than the 8-speed and needs an oil change every couple of years. Shifting is by a single cable through Shimano's Rapidfire trigger or a twist shifter, and the hub can shift at a standstill, which is a real advantage in traffic. It takes a single sprocket for chain or a Gates belt sprocket, has a centerlock disc mount, and is drilled for J-bend spokes in 32 and 36 hole.
How it rides
An Alfine 8 bike is quiet, clean and undemanding: no derailleur, no cassette, shifting while stopped, and with a belt nothing to oil. The 307% range covers city riding and moderate hills; for steep terrain and touring the Alfine 11's 409% range is the better choice. For a commuter or city bike, the Alfine 8 is the Shimano internal hub we recommend.
Specifications
| Position | Rear |
|---|---|
| Axle options | Bolt On 10x135mm Rear |
| Driver bodies | Internal Single Speed Spline |
| Drillings | 32h, 36h |
| Spoke head | J-bend |
| Brake | centerlock disc |
| Left flange diameter | 92.6 mm |
| Right flange diameter | 92.6 mm |
| Left center-to-flange | 31.9 mm |
| Right center-to-flange | 25.4 mm |
| Spoke hole diameter | 2.6 mm |
| Weight | 1670g |
| Material | Aluminum |
| Finishes | black, silver |
About this listing
What sets this listing apart from the other Alfine 8 versions: centerlock rotor mount, Bolt On 10x135mm, 32h, 36h drilling, about 1670g, in black, silver. Pick the one that matches your frame and rotor and the rest of the hub is identical.
This is the centerlock Alfine 8: the rotor sits on a spline and a lockring holds it, which saves weight over six bolts and makes swapping rotors a one-tool job. If your rotors are 6-bolt, a centerlock adapter fits them, or choose the 6-bolt version of the same hub.
Sizes, fit and compatibility
The Shimano Alfine SG S7001 8 SPD Intertnal Centerlock Rear Hub comes in the drillings listed on this page in 135mm quick-release spacing with a centerlock rotor mount; it needs a frame with horizontal, track or sliding dropouts, or an eccentric bottom bracket, to tension the chain or belt. J-bend spokes in any gauge; we build most Alfine wheels with DT Champion or Competition or Sapim Race spokes and brass nipples.
It pairs naturally with the Velocity Dyad, Chukker and Cliffhanger, Mavic A319 and Velo Orange Voyager rims. Pick commuter as your bike type in the configurator and it recommends a spoke count and lacing pattern.
Build a wheel around it
Offered for road rim brake, gravel and road disc, track and road single-speed, touring, tandem and e-bike, mountain bike, MTB single-speed and fat bike builds in our Custom Wheel Program. Start with the Shimano Alfine Sg S7001 8 SPD Intertnal Centerlock Rear Hub and the configurator pins it for you, then checks each choice you make against it.
Testing, standards and warranty at Shimano
Shimano publishes no load, fatigue, or salt-spray figures for its hubs. Its US warranty states that most bicycle products are warranted free from defects in material and workmanship for two years from original purchase, and that DURA-ACE and XTR components and wheels are covered for three years, for the original owner with proof of purchase. Competition or commercial use, improper assembly or repair, finish deterioration, labor, and normal wear are excluded; bearings, corrosion, dust seals and spokes are listed as wear parts.
Shimano's higher-end hubs, including the Dura-Ace R9270 wheel hubs, use cup-and-cone loose-ball bearings, which Shimano says “effectively displace lateral and vertical loads for smooth rotation and excellent durability — [and are] easier to adjust and service”. For the 2026 Dura-Ace WH-R9370 wheels Shimano states the system offers 30% lower rotational torque than typical cartridge bearings, that durability is enhanced with improved waterproof seals, and that balls, cups and cones are all replaceable. Dealer manuals instruct that only Shimano-specified lubricants be used, internal parts not be oiled, and the hub be inspected if the wheel becomes stiff. In 2023 Shimano introduced the TC600, TC500/QC500, QC400 and QC300 cartridge-bearing hubs with “Labyrinth & Contact” seals, described as double-sealed. A 2007 Bicycle Retailer report described Shimano's Malaysian hub and wheel factory as ISO 9001 and 14001 compliant, 89,000 square meters with 2,087 employees.
Certifications
- Warranty: 2 years / 3 years — Most bicycle products two years from original purchase; DURA-ACE and XTR components and wheels three years; original owner, proof of purchase; wear parts excluded (bearings, dust seals, free hubs, driver bodies, pawls, spokes) (source)
- ISO 9001 and ISO 14001 (Malaysian wheel/hub factory) — Reported by Bicycle Retailer, 19 Dec 2007: factory producing wheels incl. Dura-Ace, hubs, cranks, pedals is “ISO 9001 and 14001” compliant; 89,000 sq m, 2,087 employees (source)
Sources on Shimano's site:
- SHIMANO Warranty Policy | Ride Shimano US
- Is Shimano abandoning cup and cone hubs? - road.cc
- Shimano says RIP to cup-and-cone bearings with new hubs - BikeRadar
- Shimano's new Dura-Ace wheels double down on cup-and-cone hubs - BikeRadar
- Shimano Dura-Ace WH-R9370 C50 first look - BikeRadar
The figures, certificates and media above are Shimano's own. ProWheelBuilder does not run these tests; our part is the wheel we build on the hub.
Building it at ProWheelBuilder
Shimano makes the Alfine 8; ProWheelBuilder is an independent custom wheel builder in Georgia and not the manufacturer. We measure the rim before we cut a spoke, bring the wheel up in three or four rounds with a gauge, stress-relieve it between rounds and true it last, then tape it and fit a valve if you want it tubeless.
Only compatible hubs and spokes appear in the configurator, impossible combinations are struck through rather than hidden, and the price is live.
Warranty
Shimano's warranty. Shimano covers its bicycle components for two years from original purchase, with three years on DURA-ACE and XTR and one year on wheels, footwear and soft goods. Shimano's obligation is to repair or replace at its option, against the original dated receipt.
ProWheelBuilder. Our one-year wheel warranty applies to any wheel we build around this part, alongside whatever the manufacturer offers. Inside that year, broken spokes are replaced no matter how they broke, and the wheel labor is ours - truing, re-tensioning or a full rebuild. A rim or hub failure that the maker covers, we claim for you and see through; one the maker declines, we answer with an eligible replacement at 25% off current retail. Shipping both ways is yours, and components you supply yourself fall outside this cover.
Full terms are on our Policies & Warranty page.
Alfine SG S7001 8 SPD Intertnal Centerlock Rear Hub questions
Will my rotors fit this hub?
This is the centerlock version, so a splined centerlock rotor drops on and a lockring holds it - one tool, no six bolts to torque or lose. If your rotors are 6-bolt they will fit with a centerlock adapter, or take the 6-bolt version of the same hub, which is a separate listing.
Which spokes and nipples suit the Alfine 8?
For most riders a double-butted spoke such as Sapim Race or DT Competition with brass nipples; lighter riders can go to Sapim Laser or CX-Ray. The configurator recommends a gauge and count for the Alfine 8 from your bike type and weight.
Does the Alfine 11 work with a belt drive?
Yes. It takes a Gates belt sprocket and is one of the most common hubs on belt-drive commuter and touring bikes.
What frame does the Alfine 11 need?
One that can tension the chain or belt: horizontal, track or sliding dropouts, or an eccentric bottom bracket. Vertical dropouts need a tensioner.
How is the Alfine 11 maintained?
An oil change every couple of years and the occasional cable adjustment; the hub is sealed and the gears run in an oil bath.
Which axle spacing does it fit?
Bolt On 10x135mm Rear. Measure between the inside faces of your dropouts if you are unsure, or text us.
Does it need special spokes?
No. It takes standard J-bend spokes, which the configurator offers in every gauge and finish we stock.
Not sure? Text or leave a voicemail on 470-253-0929 or email info@prowheelbuilder.com — you will be talking to the people who build the wheels.
