If your bike is shifting poorly, its probably because of stretched cables. As it turns out, i dropped a few right side bearings into the driver unit, then all the. Nexus also makes three speeds also and with sevens, eight and now elevens available the choices are all good. My bike a kettler spirit came with a shimano nexus 8 hub, one of the current sgr831 models, and i had been very happy with that. The comparable sram 3spd hub w coaster brake weighs in at 90g, or 3lbs. The purpose of the hub is to provide consistent shifting with fewer maintenance issues. I have also heard that internal gear hubs are generally maintenance free. If shimano grease or a shimano lubrication kit is not used, problems such as a malfunction in gear shifting may occur. When we get one of these hubs from shimano, or on a built bike, they come packed full of grease. The reason its not more widespread in the bike industry is that belts cannot be used with derailleurs.
Shimano nexus sg8r20 8speed internally geared hub with roller brake this hub was ridden less than one year in seattle. Ive had numerous problems with the chain and got my third chain a few months ago. Shimano internal gear hubs shimano makes several 8 speed internally geared rear hubs, and for 2011, they also have an alfine hub with 11 speeds. Shimano nexus sgc60008c 8speed internally geared coaster brake. I recently had the shifter mechanism replaced for my nexus 3speed and still i cannot get first gear. Shimano nexus 3speed coaster brake internal gear hub sg. Shimano nexus 7 speed internal rear hub wheel set comes with both front and rear wheel. Shimano bike components closer to nature, closer to people.
It is the nexus model, which is written on the body. Furthermore, we at shimano have enhanced the product lineup, which was developed to provide more comfort and pleasure for commuting and shopping closely related to everyday life. For optimal functionality and extension of maximum reliability. Bicycle internally geared hub shifters modern bike. This is the most common 3speed internal gear coaster hub on new bikes. Shimano nexus 3speed hub problems bicycles in newcastle. Shimano nexus 7 and 8 require a different approach which will be discussed in a future video. Universal cycles shimano alfinenexus internal gear hub.
Shimano nexus sg8r20 8speed internally geared hub with roller brake. 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. Upgrade your ride with this easy to install, smooth, and durable shimano 7 speed wheel set. Shimano 3s internal gear hub service part 1 youtube. The gear changes are more consistent and there is not longer any play in the. How to do an oil bath on a shimano alfine 8speed hub. The internal shift system consists of those parts of the bicycle which allow you to shift gears including the shifter, rear hub, and shift cable. With most shimano internally geared hubs, grease is used to lubricate moving parts. The nexus 8speed system delivers a high level of design, quality and function. Above all, the optimality of repair and maintenance parts holds the key to it. Gear hub label sale 2 brand rohloff 2 shimano 9 colour black 4 greysilver 4 sort.
If the special grease or lubrication kit is not used, problems may occur such as the gear shifting not working correctly. Shimano nexusalfine 3, 4, 7, 8, 11 speed hub technical information. The nexus 8speed transmission offers an excellent range of gears equivalent to an 14 cassette wide enough for most riders on most roads in britain. Like other internal speed hubs, one gear is neutral, as if the bike were a onespeed. Shimano rear internally geared bicycle hubs for sale in. Belt drive is ideal because its very low maintenance and it offers 34x the service life of a chain. 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. Geds 12 reasons to consider nexus 8 hub gears on your next bike.
As you are aware, consistent maintenance is critical to the bike performance. Place the righthand dust cap brighthand dust cap c onto the driver on the right. Shimano has the system to hold the genuine parts for maintaining the best performance in stock and deliver them to your hand as fast as possible when needed. Shimano nexus di2 sgc70505d internal gear disc hub 38 x 5 black 32h. With a flatblade screw driver, carefully pull out the small spring assembly. The shifting mechanism is enclosed, keeping the shifting system lubricated for low maintenance. However, here in minnesota, extreme temperatures can change the way grease acts, especially when youre dealing with gears only a few millimeters in diameter. The nexus 3spd hub is relatively inexpensive, and will afford multiple gear choices on a bike that is unable to mount a standard derailleur. Shimano alfine inter 11 internal gear hub article index. Below is the driver unit disassembled friction ring version. Well, shimano s eightspeed alfine hub, with trigger shifters and disk brake option, gives similar performance to the inter8 but with less of a weight penalty though more cost and would suit. The series features, for example, low maintenance by the internal geared hub and easy pedaling even while the light is on by the builtin hub dynamo.
The nexus hubs are the best choice for retrofit application with a wide gear range. There have been some improvements however as a result of this change. City, sport shimano alfine sg500 2006 8 307% 1600 g city shimano nexus inter8. We believe in the power of cycling to create a better world as we move forward. The nexus 8speed system delivers a high level of design, quality and. How to adjust a shimano 3speed hub gone outdoors your. For moredetailed advice on installation of sprockets and setting the gear range, see the section on sprockets in the main article on internalgear hubs. The main details of this hub are described in us patent 5,322,487 1994. Shimano internal gear hub service aarons bicycle repair. Out of sight and out of mind, internalgear ig hubs offer you a wide range of gears for tackling hilly terrain like a derailleur, but offer many benefits for city riders like ease of maintenance and the ability to shift while at a stop. The rod shifts the internal gears, giving the bike effectively three different gear ratios. If seo wizardry works its magic, then you probably stumbled across this page because youre looking for information on the shimano nexus 3 sg3c40 internal geared hub.
More expensivequality internal gear hubs cost a lot of money. However, in wet climates we still recommend an initial weatherizationoverhaul at miles. There is so much information about the shimano nexus inter8 hub that the. For carrying out maintenance, the use of shimano internal geared hub. There is no standard shimano manual giving names to all these parts. What rear hub to use with 8fun electric bike forums q.
Also, for carrying out maintenance, the use of shimano internal geared hub. Neither the shop nor shimano used enough grease and oil for nw weather. Another article on this site covers maintenance issues that apply generally to 4, 7, 8 and 11speed shimano internal gear hubs antirotation washers. Much of the maintenance of the shimano alfine inter 11 can be done by the user. Im willing to bet you are in the same boat i was you own a bike with a 3c40 hub, but cannot find a lick of reliable information out there, even on shimanos own. Being of a tight fisted nature, i didnt shell out sixty notes for shimano blue oil, but used some hypoid gear oil i had laying around. Buy internal hub maintenance oil kit at best price. I have a just over one year old halfords carrera subway 8, with shimano nexus hub gears. Internal gear hub maintenance bicycles stack exchange. Many technical advances have been achieved, like incorporating shimano s unique gear change support mechanism that makes a real low effort shifting. Experienced commuters have a secret for troublefree riding day after day. Nexus is a family of parts, but the most exciting part is the series of multispeed hubs 3, 7, 8 and 11speed versions. 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. How to convert a shimano alfine 8 speed internal gear hub to oil.
Today, were going to work on internal multi speed hubs. This article applies to shimano 8speed internal gear hubs only. Shimano rear internally geared bicycle hubs for sale. In addition, do not use any hub dynamos other than function is activated and the liquid crystal display turns off. Just check out spottys builds, he sure put together some very fine 2 bikes there. The table of contents below is a clickable image map. Shimano nexus service instructions manual pdf download. I bought it on the promise of it being low maintenance but its been anything but.
Ighs do need maintenance every now and then, though. In this video i will be showing you how to adjust the gears on the shimano nexus 3 system properly. Maintenance is very easy as the oil can be replaced without even removing the wheel from the bicycle. View shimanos manufacturing technologies, enthusiasm for design and craftsmanship, ir information, recruitment information, and social activities. Shimano nexusalfine 3, 4, 7, 8, and 11speed technical. Because the nexusalfine hub is so well designed it will work with the gripshit, but you get worse shifting with more pawl skipping and slipping out of gear at intersections right out the door. Shimano sg3c41 3speed internal gear hub with coaster back pedaling brake. The shimano nexus group combines the best features of your old 3 speed, and eliminates the worst, thanks to modern materials and technology. Shimano gear hub oil to service and maintain internal gears hubs to keep them running smoothly and reduce wear and miss shifting from dirt oil. And this post is mostly about hubs, about whether getting a shimano nexus hub serviced is a good idea, and whether a premium redline nexus hub is actually any better. Shimano nexus 8 hub gear problems cyclechat cycling forum.
The nexus 8 speed takes an optional roller brake, and the alfine 8 speed and 11 speed hubs take a centerlock disc that works with most disc brake systems. Internal geared hub coaster brake disc brake shimano. The cable activates a lever arm, which pushes a rod into the hub. Gear range nexus is a family of parts, of which the nexus inter 8 eight speed hub is one. The old sturmey 3 speed hubs with s2s are also a good upgrade possibility.
Page 1 si7bf0b service instructions page 2 the dh3nb1qr and dh3rb1qr hub dynamos are for use will damage the unit surfaces. 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. Place righthand dust cap c onto the driver on the right side of the hub body. You change gear with a simple twist of the shimano revo gear shifter, pictured. I think someone on yacf was flogging the innards of a nexus. Now, the first thing you want to do is go up to the shifter on the handlebar and put it into second. Shimano bicycle internally geared hub parts modern bike. Compatible with nexus 8 systems optical gear indicator precise, triggerstyle actuation item specifications color. Buy internal hub maintenance oil kit at best price order shimano hub accessories at bikediscount now. Popular name manufacturer new releases price 09 price 90 discount. Get the best deals on shimano rear internally geared bicycle hubs when you shop the largest online selection at. To build closer relationships between people, nature, and bicycles. Also, for carrying out maintenance, the use of shimano internal geared hub grease or a lubrication kit is recommended.
If the wheel becomes stiff and difficult to turn, lubricate it. Shimano nexus and alfine eight speed internalgear hubs. Great savings free delivery collection on many items. Shimano nexus 8 premium hub problem ridemonkey forums. Do not use them with any other roughly 1 minute after stopping the bicycle, the energy saving bicycles. Shimano nexus inter 3 internal gear hub sg3r40 36 hole roller brake bike. Shimano internal hub maintenance oil kit hub accessories shop. Shimano alfine di2 sgs505 8speed internally geared rear hub disc brake slv 32h.