If after adjustment the noise persists or grows louder, stop the bicycle and try to locate the noise. Shimano nexus is a brand of bicycle components which includes products such as epicyclical gear hubs, cranksets, shifters, brake levers, hub brakes, hub dynamos, and a cpu for automatically changing gears. I recently had the shifter mechanism replaced for my nexus 3speed and still i cannot get first gear. In the basic instructions below we show the main points for attention. Shimano 7speed hubs have a overlocknut spacing from 127 to mm, as sold. Id like to get it 5mm however if possible to help with the chainline currently at 42. Hit the town in style, with alfine a highgrade groupset built for the sophisticated urban rider. We ask for your understanding as you may experience delivery delays. D 5 mm 7speed with an improved internal gear mechanism that allows for a smoother ride, the shimano nexus sgc30017d hub offers a dependable 7speed gear range. The shimano nexus 7 speed hub is available in either coaster brake or roller brake.
Have you checked the indicator for the change wire. Hold the two bevelled surfaces of the hub axle on the sprocket side in a vice. Shimano nexusalfine 3, 4, 7, 8, and 11speed technical. Shimano internal gear hub service aarons bicycle repair. The tradeoff for its simplicity and ease of use is that you dont get the gear range of a typical doublechainset system, which is more like 340 percent. This manual describes complete disassembly and assembly of the shimano nexus 7. Shimano nexus 3 parts list exploded diagram and parts list for the shimano nexus 3speed coaster brake sg3c41 shimano nexus 3 owners manual owners manual for the shimano nexus inter3 coaster brake sg3c41. Place the thumb on the inside thumb lever and your. If necessary, ask your retailer to identify and correct any problems.
This is a useful procedure if your hub is showing some resistance. The procedure is relatively straight forward, and if you use widely available atf fluid, it can be very cheap too. Screwdriver left before carrying out disassembly, have ready tl7s20 right the hub spannerstl7s20. I previously wrote about the problems with my shimano 3speed hub here and here. General information on installation and adjustment of newer shimano nexus 7speed hubs is in the dealers manual.
If an unusual noise follows any shift, or while pedaling, your shift cable may need to be adjusted. Fondling the bearings of the internally geared shimano nexus 7 hub. Shimano nexus sg8r20 8speed internally geared hub with roller brake this hub was ridden less than one year in seattle. The servicing of an internally geared hub there are many benefits of using an internally geared hub. Or, if you need to clean the insides after water has entered the hub. If you bring us your bike we can preemptivly weatherize your hub and avoid expensive repairs. When adjusting the shimano sevenspeed derailleur, the rear derailleur is done off the front shifter and back end of the derailleur itself. At youll find a wide choice of highquality shimano hub parts. Shimano nexus service instructions manual pdf download. Shimano nexus sg7r50 7speed roller brake internally geared hubsrecommended gear ratio. Shimano nexus 3speed hub problems bicycles in newcastle.
There have been some improvements however as a result of this change. If the nonturn washers are installed on one side only, or if the hub nuts are not tightened sufficiently, the nonturn washer may fall out, which could cause the hub axle to rotate and the cassette joint to turn, resulting in the handlebars being accidentally. For the most part, the unit is sealed off the elements, you can use them in a belt drive system, they shift really fast, etc. Im not sure if im imagining it, but it seems like my bike has lost a considerable amount of. Brakes tektro, disc, caliper, nexus roller brake on rear of 3 speed bike. How to maintain your internal geared hub, nexus 7 igh. Engage the teeth of shimano nexus 7speed hub wcoaster brake. In this video we show you how to adjust the gears on a shimano nexus 7 hub. In this video i will be showing you how to adjust the gears on the shimano nexus 7 and 8 system. I was very concerned regarding of what i read on sheldon browns website about these internal gear hubs being improperly lubricated for use in wet climates. I was giving the bike a good spring cleaning when i noticed the rear wheel has a crack. Begin pedaling and riding the bicycle and place your right hand on the shifter pod on the handlebars.
This was originally paired with a shimano sb7s40 brake levertwist gear shifter combo unit. Hi all, i just picked up a bike which came with a 7 speed shimano hub gear with coaster brake, a shimano nexus sg7c22 inter 7 hub. Nexus 7speed internal hub sg7r50 specifications are subject to change without notice. Alfine hubs feature fancy features including optional hydraulic disc brakes and electronic shifting. General information on installation and adjustment of newer shimano nexus 7 speed hubs is in the dealers manual. The nexus 8speed system delivers a new level of design, quality and. This manual describes complete disassembly and assembly of the shimano nexus 7 speed hub sg7r45 inter7. Here i explain with pictures the stepbystep procedure for converting the shimano alfine 8speed hub to an oil bath, using atf fluid. Shimano nexus 7 speed hub shifter compatibility lfgss. Find great deals on ebay for shimano nexus 3 speed hub and shimano nexus 7 speed hub. Remove the lock nut for left hand cone and the left hand cone with dust cap from the hub axle. Shimano nexus sl7s10 shifter 7 speed with cable for sale. How to install a shifting cable to a shimano nexus 7 speed.
How to adjust your shimano nexus 7speed inner gear hub easily at home. Shimano nexus internal geared rear hub center lock disc brake o. Shimano nexus sg8r20 8speed internally geared hub with roller brake. But in practice all that means is that you have to choose the gear range youll use most. The series is primarily aimed at the comfort market such as urban commuters and tourers, and as such is not made to withstand the rigours of offroad or mountain biking. The table links to current shimano documents, but also to documents generated outside shimano, or which shimano no longer offers. Neither the shop nor shimano used enough grease and oil for nw weather. Unlike threespeed hubs which run through a single epicyclic gear. And products are delivered superfast, usually within 2 business days in the netherlands. The gear changes are more consistent and there is not longer any play in the. Stuck gear hub on the way into a gear on an internal geared hub. Do shimano nexus hubs lose efficiency as they get older. View and download shimano nexus service instructions manual online.
A simple guide to adjusting a shimano nexus hub gear. We have bikes with the nexus 7 hub, with a leveroperated rear roller brake. Bicycle internally geared hub shifters modern bike. How to convert a shimano alfine 8 speed internal gear hub. Check page 8 and see how important are small things, easy to overlook. I am trying to fix a bike which has no shifter on the handlebar and on the back wheel has a shimano nexus sg7c25 7 speed, i am trying to figure out how to install a cable so i can change gears with a shifter that i will buy. Are you looking for excellent service, a great product range and quick delivery. The crack is right where the vertical side break friction area curves over to form the inside of the wheel. Shimano nexus sgc30007r 7speed internally geared 36h rear hub. When replacing parts, replace the whole internal assembly or unit part.
The shifter is damaged beyond repair though and ive found an exact replacement, but my question is can i use a different 7 speed nexus shifter with this specific hub. Shimano nexus 7speed inner gear hub adjustment youtube. Internal shifting rear hubs electric bikes in california. Bicycle accessories shimano nexus sg7c26 service manual. Shimano nexus internal geared hub disc brake 7speed. This is the most common 3speed internal gear coaster hub on new bikes. If an unusual noise follows any shift, or while pedaling, your shift cable may need to be. Alfine is a highend product line with 8 and 11speed hubs. Sg7r46 sg7c30 sg7c18 for axle length 201 mm tl7s40b grease. Easy side of the internal gear hub nexus 7 speed, showing opening in hub where bearing cone used to be a good place to put in fresh oil.
The black oil that came out was much less than i put in. Ernst wildi 9 pages bicycle accessories shimano flightdeck sc6500 service. A simple guide to adjusting a shimano nexus hub gear as easy as. Hold the two bevelled surfaces of the hub axle on the brake arm side in a vice and remove the dust cap with a screwdriver.
The shimano nexus 7 hub gear has a range of 244 percent. I ride a 5 year old commuter bike with a shimano nexus 8 internal hub gear, thats done about 20,000km. General information on installation and adjustment of newer shimano nexus hubs is in the dealers manual. There are other nexus 7 hubs that seem exactly the same, e. Shimano nexus slc6000 8speed revo shifter for internally geared hub.
To perform maintenance on the 3, 7, 8speed nexus and 8speed alfine hubs, the internal unit first needs to wb maintenance oil be removed from the hub. Designed to improve efficiency in the nexus internally geared hub system revoshift shifter read more. Shimano nexus 3, 4, 5, 7 and 8speed hubs are currently in production as of 2014. Shimano nexus sgc30007r 7speed internally geared 36h. How to remove a shimano nexus 7 nexus 8 hub and interm roller brake rear wheel duration. View shimano s manufacturing technologies, enthusiasm for design and craftsmanship, ir information, recruitment information, and social activities.
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