0000001260 00000 n Removing and replacing the internals of the Nexus and Alfine hubs is not as difficult as you might think, because of their modular construction. The 5-speed IHG starts 1:1 in first gear and ends up with a 5th gear that is taller. The Shimano Nexus SG-C3000-7R 7-Speed comes with 2 cogs (19t/21t), 3 size chainstay clamps, 3 sets of non-turn washers, hub nuts, and cassette joint (axel). 7-speed hub (12 pages) Bicycle Accessories Shimano SC-M500 User Manual. We use cookies to ensure that we give you the best experience on our website. I suppose that could be called a blessing in disguise. 0000008805 00000 n Electrical shifters work with drop bars or flat bars. Average star voting: 5 ( 27446 reviews) 0000003374 00000 n 0000005727 00000 n A coaster brake can easily skid the rear wheel, but is hard to control and overheats on long downhill runs. See our Rollerbrake page for information on installing and removing the Rollerbrake. More information about oil lubrication is in the main file about internal-gear hubs. The photo below shows cassette joint parts for a 5 or 8-speed hub, from left to right, the driver cap, cassette joint and cassette joint fixing ring. The circlip snaps on, also most easily by levering it into position with a flat-blade screwdriver. The cassette joint is installed either of two ways, so the red dots line up. The coaster brake is also not as powerful those found on a single-speed hub. They fudge a bit, lowering the gears in order to keep the top gear from being completely useless, but then the middle gear is too low for level-ground riding. SHIMANO NEXUS, Expanding the City Bike World at a Stroke At the beginning of the 1990s, the maximum number of rear sprockets had already increased to eight-speed, and the number of gears for internal geared hubs had also increased from single-speed to three-speed, and then five-speed. This is what I did on my Nexus bike. You will see there are two lines in the window of the shifter and there is a piece inside that has a little yellow indicator. The best information available on these hubs -- including comparative parts lists -- is in Sutherland's Handbook of Coaster Brakes and Internally-Geared Hubs, which is now online on this site. SG-3R75-A. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. (The Columbia's original rim had 36 spokes). Mountain Bike Deals, Copyright 2023 Blue Spruce Ventures LLC | It weighs 1220 grams stripped in its basic version (without built-in brake). The following are instructions for the 7-speed hub. This is the first video in a series of gravel bike upgrades to the Retrospec Harper Coaster single speed bike. The dropouts of an older three-speed bicycle will need to be widened to fit these hubs. Mechanical problems can result from "preventive maintenance" including re-lubrication with incorrect grease. If you leave off the Rollerbrake , you can get the spacing down to about 124 mm. The Rollerbrake is a separate module, and when you buy the hub it is not even installed. Anti-rotation washers are specified for both sides, and must be chosen to align the shifter assembly with the cable. Clutch unit (Y-34R 98050) Return spring (Y-34R 21000) Ball retainer P (Y-34R 98070) GREASE (Y-041 20600) Installation instructions for this hub. The rotor diameter is 180mm, not the usual 185mm, raising issues of compatibility with non-Shimano caliper assemblies. It depends where it was bought, but usually you get the cog and dust cover. COMPONENT I have been using IGH's for years. For on-road (cruiser) bikes, this hub is nearly perfect, as weight & stopping considerations are a lot less pressing. This procedure is the same for the Nexus 4-, 7- and 8-speed hubs, using 4th gear as the reference. I like my 3 speed Shimano and am building a second one today because I like it so much. That is the lowest gear for some hubs, the highest for others. Remove the cable if needed before installing the cassette joint. 3. Cassette joint parts are the same for the 4- and 7-speed hubs; different for the 5 and 8-speed hubs; different again for the 11-speed hubs. Nexus and Alfine 8-speed hubs are nearly identical internally. Im planning to purchase it and install it on my fixie, as I live on hilly area of Syracuse. Shimano SG-3D55 3-speed hub with disc brake. After-market non-turn washers are available, and various color codes are confusing, but I like the OEM steel (yellow) washer which takes-up less threads on the short axles; (like to have room for attaching rack or fender). By changing the sprocket, you can raise or lower all of the gears at once. Take it for a ride and make sure it shifts properly. Now it can be replaced with the new internal assembly. 0000006205 00000 n Sometimes I find a deal, that makes finding the other parts separately worth my while. Now, the first thing you want to do is go up to the shifter on the handlebar and put it into second gear, the middle gear. Shimano sells cable-operated shifters for these hubs only for flat handlebars, but aftermarket (JTek, Microshift) shifters and a Hubbub adapter are available to fit drop bars. The comparable SRAM 3spd hub w/ coaster brake weighs in at 1390g, or 3lbs. The hub must be disassembled into its major components, solvent cleaned, dried and re-lubricated. It was first noticeable in Japan in the years following WW2. When the 16GB Nexus 7 gets to about 3GB of storage space left, it begins to slow down. 3. A 3-speed hub will work better for you if you change the sprocket or chainwheel to lower all the gears, so you use the top gear on level terrain. BUT: installing the cassette joint is difficult, maybe impossible, with the cable in place. I have a very nice 1970's Raleigh Competition racing frame which I converted into a Nexus 7-speed: Sheldon Brown's Nexus Raleigh Competition. Sturmey-Archer circlips, made of round cross-section wire, are easier to install than the Shimano ones with a square cross-section. Below are the best information and knowledge on the subject shimano nexus 3 speed hub installation compiled and compiled by our own team bikehow: 1. NEXUS INTER3 (and I'm not talking about Iron Maiden either) You will need either a a spring-loaded, pulley-type chain tensioner, rear derailer or eccentric bottom bracket, because vertical dropouts do not permit moving the axle back and forth to adjust the chain slack. Torque on the axle from the gear train is relatively low, and so the bellcrank-shifting hubs use only one non-turn washer, at the left side. The Rollerbrake also is somewhat prone to overheat, though the newer high-power model is less so, with its finned heat sink. > As mentioned, the two regular over-run ratchets are still in place. Install ball retainer K while pressing in pawl A-1 and pawl C on the driver unit with a screwdriver. Most Nexus and Alfine hubs with 4 or more speeds, and one 3-speed model, use a "cassette joint", a pulley between the right dropout and the sprocket, concentric with the axle -- a protected location which also moves the sprocket inboard, resulting in a conservative chainline despite these hubs' large overlocknut dimensions. They love that stuff. Either way is OK: you will rotate the axle when installing the wheel so the electrical connection faces forward. When an older Shimano 3-speed hub fails, it is most often because one of the under-engineered pawls has shattered. 0000008907 00000 n It's fairly easy to hook up the shifter and cable, much easier than the older SA and Shimano hubs. Alfine is a high-end product line with 8 and 11-speed hub. This is normally a right-side washer (so, the "R") but is shown on the left side in the documentation of this hub. The cassette joint fixing ring is installed so the yellow dots line up. Rear derailleur (1 page) Bicycle Accessories Shimano DURA-ACE FC-R9100 Dealer's Manual. Before installing the anchor bolt (which Shimano calls the "inner cable fixing bolt unit"), set the shifter in the loosest cable position. This will be even more of an issue if you have one of the original 8GB Nexus 7's, which doesn't give you much wiggle room for storage space. For either purpose, the low gear is still not low enough for anything but tiny inclines. Got this Nexus 3 speed with Alex Xrims 303 front and rear aluminum wheels. Alfine hubs have the Shimano CenterLock fitting, which accepts a proprietary Shimano disc brake rotor. My review: DISCONTINUED PRODUCTS, SHIMANO SERVICE CENTERS | MANUALS & TECHNICAL DOCUMENTS | DISCONTINUED PRODUCTS, Privacy Policy | Cookies Preferences | Terms of Use | California Transparency in Supply Chain Act | ADA Compliance. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. It is usually possible to spread the rear triangle of a steel (Cromoly) frame to the needed width. The rod may also be separate, be sure to get the right length, which depends on the axle length, but most 3C41 hubs have the same axle. It may not display this or other websites correctly. . Shimano 3-Speed Coaster Brake, 36H, CB, Sil 3 speed internally geared hub with integrated coaster brake Corrosion resistant coating Axle length 168mm Use: RR Gears: 3s Int Spoke Count: 36H read more Shimano ASG3C41A2068DX Ships Free Currently Sold Out your price $89.98 + ships free Info Shimano Nexus SG-C3001-7R, 36H, RB, Sil Component categories and series of GRAVEL, Component categories and series of LIFESTYLE, Component categories and series of E-BIKE, Your smartphone to cycling computer on the bike, SHIMANO bicycle ride data collection/analysis service, SHIMANO AGAINST THE TAMPERING WITH E-BIKES, Internal geared hub for Coaster Brake version. The most counter-clockwise setting will delay shifting. It should also not be taken as a general indictment of Shimano's internal-gear hubs. Any good bicycle mechanic will be able to do this, or you can do it yourself. Aaron's Bicycle Repair, in Seattle, Washington, USA, can rebuild these hubs. Relubrication using oil and waterproof grease is highly recommended to keep water out of the mechanism. Hold the left hand cone, and then remove the lock nut for left hand cone. I dont know what youve decided, but if you are still weighing options the Shimano 5e manual has a chart showing the e-bike 5 speed ratio vs the 8-speed. The yellow line on the paddle should be between the two yellow arrows. Next, remove the left hand cone. Bicycle Accessories Shimano NEXUS SG-7C26 Service Manual. This is the first video in a series of gravel bike upgrades to the Retrospec Harper Coaster single speed bike. The SG-3D55 is Shimano's good ol' Nexus three speed in an aluminum shell with the main drive ratchet replaced by a roller clutch. Stage 3: [insert name here]'s improved product quality is noticed, [insert name here]'s reputation rises. Sutherland's Handbook for Bicycle Mechanics, 4th edition, includes much of the same information but is now out of print. The 1936 Sturmey-Archer AW hub became the standard of the industry for the next 60 years or more. A video of disassembly and reassembly is available here. The shimano 8 speed has a good reputation on mtbforum. You are using an out of date browser. Shimano published a Nexus dealer's manual (now archived), with most of the needed information about Nexus 5, 7 and 8-speed hubs; however, there is additional information in documents (some also now in the Internet Archive) linked below and on the pages on this site for individual hub types.. Nexus 7 and 8-speed hubs have an overlocknut spacing ranging from 127 to 135 mm, as sold: see Shimano's overlocknut spacing chart. COMPONENT With the exception of the early 3-speeds, Shimano internal-gear hubs provide reasonable service if not abused. Shopping List:Retrospec Harper Bike - http://bit.ly/3pqgfWTNexus 3-Speed - https://amzn.to/3s0cyJ0Spoke Wrench - https://amzn.to/3u3diisWheel Truing Stand - https://amzn.to/37jrgTNBike Repair Stand - https://amzn.to/37mQsbTRelated Videos:Harper Coaster Unboxing - https://bit.ly/retrospec_harperBuild a Bicycle Wheel - https://youtu.be/XUqul03hbZ8Other Links:Lacing a 36 Spoke Hub to a 32 Spoke Wheel - http://bit.ly/3u3g5Is 0000006049 00000 n In some cases, it is possible to convert an existing bicycle to the use of a Nexus hub. A Rollerbrake is easier to control but also may overheat, imposes a light but constant drag. We and our partners use cookies to Store and/or access information on a device. See the separate articles on this site about disc brakes, coaster brakes and Rollerbrakes. As with most other internal gear systems, Shimano uses tab washers that engage the dropout slots to keep the axle from turning. > When you get the yellow right between the two lines, go ahead and put the lock nut right up against the body of the shifter, and tighten it with the 10 mm wrench, so that adjustment stays nice and firm. Any good bicycle mechanic will be able to do this, or you can do it yourself. Other than that, installation is similar to that of other cassette joints. Another way to tell that this is Shimano is that the cable chord goes straight into the adjustment knob, which goes straight into the body of the shifter. The combination of design and metallurgy of the Shimano 333 hub was probably adequate for the needs of the Japanese market, but when sold in the U.S., the hub acquired a reputation for unreliability. 0000001443 00000 n Of course, I am old and weak and feel no need to go faster than 20 mph. UM User's Manual SI Service Instructions EV Exploded View QM Quick Manual SM Service Manual Currently available manuals and technical documents from Shimano are posted on this site. Note: Do not damage the threads of the hub axle. If there is no Rollerbrake installed, the overlocknut spacing can be smaller, down to about 124 mm, using a thinner locknut. ;-). Information about specific models is in the articles about. > Save money. The installation instructions specify a yellow washer, type 5R, for the coaster-brake version of the hub to place the axle with its round sides in the edges of the dropout slots. Or you can leave the rotor off, install the supplied cover for the CenterLock fitting, and use a rim brake. With the 8-speed, however, the marks you need to line up are yellow, not red. The motor unit for a hub with electrical shifting is installed with both the hub and the motor unit in first-gear position. NEXUS 3 SPEED COASTER HUB PARTS SHIMANO SG-3C41. Shimano Nexus Inter 3 hub laced with spokes and mounted on a bicycle. The circlip can be pried off with a thin flat-blade screwdriver, and the sprocket can then be lifted off. About Us | - First gear isn't low enough, especially without a granny-gear chainring. Copyright 2012-2022 EBR Electric Bike Review, Inc. Also operating under the name EBR. Inter 3 - This hub has three speeds with 36% intervals and an overall gear range of 186%. Turn it clockwise to lock it. The ring clips come in rounded or squared spring wire, either will work. The photos below show the steps in installation of the cassette joint on an 8-speed hub. Except with vertical dropouts, the tab should preferably face the closed end of the dropout slot, for better engagement. The 8-speed adds lower gears for hills, with it's 1:1 ratio at 4th gear. Because the shift cable linkage ("cassette joint unit" in Shimano-speak) is also keyed to the axle, different anti-rotation washers work with different dropout angles. - Weight (2-1/2lbs or 1120 grams), Company The 8L and 8R may be useful with forward-facing dropouts if you would like to run the cable up a seatstay. Color: Silver. Add to another list Rider questions Rating Review Reviews The next country in this sequence was Taiwan, which hit stage 3 in the mid-late 1990s and is currently in stage 5. With any of these brakes, a front brake also should be installed -- see my article about braking and turning. These are listed for most hubs in the hub dimensions document linked below. 3. Place the motor unit over the end of the axle so that marks on it line up with marks on a spacer inboard of locknut B, as shown in the image below. The first thing you do is loosen the lock nut right up against the body of the shifter. It works! Set the drive unit while align the shallow side of groove of driver unit and wider portion of swelling on the clutch unit. Note, only the eccentric bottom bracket, not the chain tensioner or rear derailer, will work with the coaster brake version of the Nexus hub, because backpedaling places the lower run of the chain under high tension. We and our partners use cookies to Store and/or access information on a device. The following are instructions for the 4- and 7-speed hubs. To replenish oil between rebuilds, you must either unscrew the left bearing cone (which requires removing the wheel from the bicycle) or else add an oiling port, such as a Sturmey-Archer oil cap. MANUALS & TECHNICAL DOCUMENTS (The bigger part is downside.) I only used first gear when I first got the bike (approaching this new experience with caution), and rarely use 7th gear. (B) Right-hand lock nut A #13 and #14 spoke compatible; FIND A DEALER. A brown washer, Type 5L, is specified for the Rollerbrake version, also installed on the left side. The axle flats and washer tab are not in line with each other, as with Sturmey-Archer and Sachs/SRAM hubs, and so you may have to file the dropout slots of an older bicycle to fit a Nexus hub. Shimano Nexus 3-Speed Hub Installation - DIWHY.LIFE. The sprocket is held in position by a spring circlip (snap ring). Looking for specific info? Install it if necessary. Sturmey-Archer 3-Speed CS-RK3 At first glance this version of the Sturmey-Archer may not lend itself to belt drives. Hi Akash, during the pandemic there was definitely a shortage of options as people were buying them up to upgrade their bikes. The 5-speed is covered in the Nexus dealer's manual, linked below. Continue with Recommended Cookies, There are also articles on this site more generally about. DM General Operations (DM-GN0001) Tag (Choose from the list below) series generation component ROAD GRAVEL MTB E-BIKE URBAN TREKKING BMX - Coaster Brake, Cons- Not easily serviced by the user. Coaster Brake. You need two tools: an open end 10 mm wrench and you may also need a pair of pliers. Cable-operated and hydraulic disc brakes are available. k(3001(&U6CVF!i50'n`#u)/oatu\F@ )X&@ V Metal wear particles contaminate the grease, and so the hubs require periodic cleaning and replenishment of a special grease that does not make the pawls stick. This book also is out of print, but copies are available used at a reasonable price. Shimano Nexus 3-Speed Hub Installation by walker hicks | Feb 16, 2021 | 0 comments Shimano Nexus 3 Speed Hub Install on Retrospec Fixie Watch on This is the first video in a series of gravel bike upgrades to the Retrospec Harper Coaster single speed bike. SHIMANO SERVICE CENTER Hub Width: 4 3/4" or 120mm. Got this Nexus 3 speed with Alex Xrims 303 front and rear aluminum wheels. Sometimes it happens that wheels are sold without a cog, dust cover, ring, or any mounting parts. If they are not, use the electrical shifter to shift the motor unit to first-gear position. This is especially the case if a hub has a coaster brake, due to the heat this brake generates. SHIMANO NEXUS Internal Geared Hub Disc Brake 3-speed VIEW PRODUCT. Shimano Nexus 3, 4, 5, 7 and 8-speed hubs are currently in production as of 2022. Internal-gear hubs always require some system to prevent the axle from rotating, as it is used as part of the gear train.