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Topic: Internally geared hub

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	Bicycle brake systems - Wikipedia, the free encyclopedia
		As the machines were fixed gear bicycles a rider could reduce speed by reversing the thrust on the pedals.
		When such a hub is pedalled forwards, the sprocket drives a screw which forces a clutch to move along the axle, driving the hub shell or gear assembly.
		In all of these designs, the braking force is applied by the rider squeezing a lever mounted on the handlebar; this causes friction pads (usually made of leather or rubber) to contact the rim of the rotating wheel, thus slowing it and the bicycle.
	en.wikipedia.org /wiki/Spoon_brake (3981 words)

	Custom Equipment - Future Fantesy
		The hub at right by Shimano and the similar models by Sturmey Archer provide 5 to 7 speeds (higher number of speeds may be available soon) have the advantage of lower maintenance, and some have indicated, less probability of freeze-up in the slushy weather.
		The other advantage of the internally geared hub is the ability to install a totally enclosed chain line.
		There is a slight drag penalty, even when the hub is not generating power, (about 2 watts, cyclists normally are capable of sustaining around 100 watts, with surge capacity to 150 watts), not something you will notice.
	www.icebike.org /Equipment/CustomEquipment.htm (1281 words)

	Hub and Rim Measurement Information
		For single speed or internally geared hub's, the flanges might or might not be off-center, so it would be best to measure them assuming that they are to make sure the HFO values are accurate.
		For standard front hub's, the hub flanges are equal distances from the center of the hub, so the HFO value for one flange is the same as the HFO value of the other.
		For standard front hub's all you need to do to calculate the HFO value is this; Measure the separation of the flanges at their mid point, like if the flanges were extremely thin.
	www.geocities.com /spokeanwheel/measure.htm (3423 words)

	Internal hub index shifters - Dirt Rag Forums
		Isn't the indexing in the hub with the Shimano and SRAM internally geared hubs?
		With the Rohloff, the indexing is all in the hub.
		Oh, and I think the hub is not internally indexed, which is why I am worried about slapping a different shifter on it.
	www.dirtragmag.com /forums/showthread.php?p=98061#post98061 (341 words)

	Epicyclic Hub
		With the hub gear ratio the effective diameter of the wheel was 36".
		Outside gear sytems required odd and necessarily shaky locations for split crank assemblies in which two short cranks must be attached, one to each side, of the fork.
		The gear ratio must be greater than one (the difficult one in this case) because the goal is speed.
	staff.washington.edu /gharper/EpicyclicHub.htm (795 words)

	Hampshire Community Bike Program :: Development :: Building An Automated Community Bike Program
		A shaft-drive bicycle uses an internal gear mechanism to drive the rear wheel.
		Internally geared hubs allow users to have a variety of gears without requiring an external derailleur.
		Internally geared hubs also optionally come with an integrated coaster brake.
	www.redjar.org /jared/projects/communitybike/summary (10653 words)

	Gear & Pulley engineering - Bicycle Driveline Efficiency, Chain vs. Shaft
		Internal gear hubs are designed to require fewer gears to cover a wide range of gearing.
		For instance, each gear change on our bike is like changing 2-3 gears on a chain bike - so you can transition quickly from hill climbing to cruising with a quick twist of the wrist.
		Hub gears are totaly enclosed and operate in a protected enveironmnt.
	www.eng-tips.com /viewthread.cfm?qid=128799&page=5 (932 words)

	League of American Bicyclists * News
		An internally-geared hub is best for acceleration, because it shifts when the bicycle is stopped or moving very slowly, and you can easily tell what gear the hub is in.
		Hubs with 5 or fewer speeds should be set up so the starting gear is their lowest gear.
		If the starting gear is on the largest, inner sprocket at the rear wheel, you find the starting gear simply by shifting the rear derailleur to the end of its travel – entirely by feel.
	www.bikeleague.org /news/021106_edu.php (542 words)

	Popular Science Magazine (Site not responding. Last check: 2007-09-29)
		In the evolution of ride-over-anything mountain bikes, the ever-vulnerable rear derailleur—that gangly parallelogram that shifts the chain up and down the rear cogs when it’s not clogged with mud or bent by rocks—has been a glaring technical handicap.
		By using an internally geared rear hub and moving it to the center of the bike, GT created a more stable center of gravity and a stronger rear wheel.
		The hub’s internal gearing determines the speed of this chain.
	www.popsci.com /popsci/printerfriendly/whatsnew/96c68ca927d05010vgnvcm1000004eecbccdrcrd.html (269 words)

	Welcome to the Atomic Zombie® Extreme Machines krew! - gears?
		I'd sure put gears on a chopper, since the position is pretty aero, it could possibly be managed as a serious riding bike.
		There are a ton of 3 speed internally geared hubs at the dump though, and that would give you a nice clean chain line.
		It was wanting an internally geared hub that basically got started on this whole 'make your own bike' thing in the first place.
	www.atomiczombie.com /forum/topic.asp?TOPIC_ID=165 (2747 words)

	Cornell Moonbuggy
		By using the internal hub shifter, we can use BMX chains which don't have these modifications and will be less likely to slip from the sprocket.
		A chain will run from the chainring to the internal hub shifter which is mounted in specially made slots on the frame.
		The attachments for the hub were made using a rotary table on a mill and the attachments for the drive axle was made on a lathe.
	www.mae.cornell.edu /Moonbuggy/2001/drive.html (4939 words)

	Rohloff Bike Hubs.com: Call 604-818-1742 for the new infinitely variable internally geared freeride bicycle hubs.
		We found the freeride hub to have much easier installation and cabling was far less prone to damage from crashes.
		We found the hub to be strong enough for downhill and freeriding, yet versatile enough for cross-country, commuting and even touring.
		Note the ingenius way that the rotor integrates with tabs on the hub shell and then is locked in place by a massive nut with a standard cutout for the standard bottom bracket tool.
	www.rohloffbikehubs.com (1138 words)

	Geared 36 - Unicyclist Community
		The other advantage with the jackshaft gearing is that you can gear it higher than you can with an internally geared hub.
		The trick is that the hub body is on bearings and is able to rotate faster than the spindle.
		I think that because your inputs are magnified at the wheel due to the gearing, that you have a smaller "sweet spot" of controllability.
	www.unicyclist.com /forums/showthread.php?s=&threadid=36273&highlight=jack (1247 words)

	[hpv] Torque Arms
		On an internally geared hub, the cog gear isn't attached to the hub.
		When the gear ratio is something other than 1:1 (most of the time; on the Rohloff, 1:1 only happens in 11th gear), there is also a corresponding difference in input and output torques.
		Since the input and output parts are both rotating and at different rates (the cog gear and the hub), this difference in torques has to show up somewhere else.
	www.ihpva.org /pipermail/hpv/2000-August/008062.html (736 words)

	[No title]
		Hope's new Pro II hubs are the next evolution in disc hub designs for lightweight bikes, but they've still got the durability to handle aggressive use.
		Saint uses a 20mm throughaxle front hub and a solid 10mm rear axle, which add stiffness to the front and rear of your ride.
		The new Hone all-mountain hubset adopts the Saint-type bolt on rear derailleur mount.
	www.jensonusa.com /store/sub/140-Hubs.aspx (420 words)

	Lightfoot Cycles - Products (Site not responding. Last check: 2007-09-29)
		The advantage of having the hub gears is that you can shift to any gear, whether stopped or not, and whether pedaling or not.
		The drawbacks to the internal gears are that they are less efficient in power transfer than a derailleur system (86-92% efficient as compared to the derailleur's 95-97%), and their internal workings are mostly inaccessible to the home mechanic.
		This wide-range 3-speed internally geared hub combines with an 8-speed cassette with derailleur externally to provide a total of 24 gear choices.
	www.lightfootcycles.com /custom.htm (2370 words)

	Speedgoat Bicycles
		Sure, the hub was on a bike, but that's not what I'm going to talk about, i'm going to talk about the quirky little thing called a Rohloff Speedhub.
		The Speedhub is an internally geared hub giving you 14 speeds covering much the same span as your typical mountain drivetrain.
		If you shift to an easier gear under tension, one of the benefits of the system, you do need to exert a lot of pressure on the twist grip shifter, and if I had weak hands I might have a hard time doing that.
	www.speedgoat.com /blog.asp?o=175 (2979 words)

	[trikes] Trike suggestions....
		While I find my dual drive hub unnecessary for my daily recreation/training rides here on the Snake River plains, as soon as I venture east or west into the mountains with camping gear I find I'm shifting through the whole range and happy that I can enjoy a climb without going into oxygen debt.
		If you are considering an internally geared hub like a dual drive, I can't imagine what a 9 speed cassette will buy, while it might eliminate a lot of otherwise good selections.
		I'm aware of all the chatter about weight and inefficiencies of the internal gear hubs, but for heavy touring in mountains I think the wide range offered is a good tradeoff.
	www.ihpva.org /pipermail/trikes/2003-June/025735.html (763 words)

	Adventure Cycling Forum -
		With a low gear a lot of force is being transmitted through the hub to the rim, and mainly on one side.
		She climbs a 12% grade at a steady 2 mph using a 22" gear.
		The spokes transmit torque from the rear hub to the rim.
	www.adventurecycling.org /forums/viewmessages.cfm?forum=9&topic=830 (994 words)

	BikePortland.org » Blog Archive » The perfect “Portland Bicycle”
		I know a guy who’s had a bike built without any derailleurs — with internal gearing in the front as well as the rear — and it’s been a maintenance nightmare.
		Internal hubs are practical workhorses for utilitarian cycling, and the newer ones are a great leap forward in terms of efficiency and dependability.
		As to the derailler vs. internal hub gear debate, I would not be riding a bike as much as I do if I had to ride a derailler bike.
	bikeportland.org /?p=286 (1466 words)

	SRAM \| Service \| FAQ (Site not responding. Last check: 2007-09-29)
		A.The quick answer would be no. The delicate insides of the hub and the fact that shifting under load is not recommended would preclude the internal hubs from being good off-road components.
		Additionally, horizontal dropouts are required for most of the internally geared hubs that we offer.
		The internal hubs that SRAM offers are best suited, and excel at, city/easy biking applications.
	www.sram.com /fr/service/sram/faq.php?faqID=98f13708210194c475687be6106a3b84 (126 words)

	'BentRider Online Forums - Bike E hub and Barend shifter
		I have heard that SRAM has said that nearly every warranty claim on an internally geared hub was made by someone using the wrong shifter, usually a friction shifter.
		I can't really see what is used to shift the hub on models that are equipped with a hub and f/r deraillers.
		Greenspeed uses a gripshifter for their dual drive hubs with a special mounting piece for the handle bar.
	www.bentrideronline.com /messageboard/printthread.php?t=6707 (911 words)

	Rohloff Speed Hub: Worth the cash? - Dirt Rag Forums
		Plus side of Rohloff is a goof proof drivetrain that's well up out of the mud and muck with the 32:13 gears, a wide gear range, lots of BB clearance, and all your shifting is on a 14 position gripshift.
		The kicker with the Rohloff is that the indexing is all in the hub, so the gripshifty bit has two cables that rotate and counter-rotate a 1" bobbin at the hub to click the 8mm hex nubbin that actually does the shifting.
		The best part is still that you can pick any gear while stopped, so you can find the right gear to get moving again when something unpleasant or unexpected happens at speed.
	www.dirtragmag.com /forums/showthread.php?p=107329#post107329 (935 words)

	Phoenix Hub Gear Repairs (Site not responding. Last check: 2007-09-29)
		Phoenix Hub Gear Repairs is a Sturmey-Archer specialist dealer based in Milton Keynes, England.
		All Sturmey-Archer hub gear repairs undertaken and spares supplied for vintage as well as new hubs via mail-order.
		Peter Read of Phoenix Hub Gear Repairs has published a major new edition of his book of exploded drawings of every Sturmey-Archer hub ever produced.
	www.users.globalnet.co.uk /~hadland/read_ad.htm (197 words)

	Shimano Nexus Internal-Gear and Generator Hubs
		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.
		Nexus 7-speed internal gear systems also incorporate all-weather braking systems.
	www.sheldonbrown.com /harris/shimano-nexus.html (680 words)

	Commuter Bicycles
		Internal gear hubs, These are much improved over the 3 speed hubs of the 70's.
		After using conventional gears for 30 years, I adapted to the Nexus 7 internal hub in 3 minutes.
		Zero City Bicycle is a commuter bicycle that combines a drive shaft with an internally geared hub.
	mysite.verizon.net /res6sdo1/commuter_bicycles.htm (3407 words)

	Hcor.net \| Forums \| Downhill/Freeride Discussion \| shimano hub Q
		Basically when I locked the brakes and mashed the pedals(without even being on the bike) the chain would skip, but I thought it was the rear hub, and it wasn't, it was skipping on the FRONT middle(which is the outer on my bike) ring.
		Was kind of cool getting into the hub, once I saw how the bearings worked on each side, and where all the spacers and cones go, it was pretty easy putting them back together.
		Hey, that's exactly what happened to me too...it seemed as if the hub pawls weren't engaging....turns out my chain was broken...the plates on one link would separate enough for the chainring teeth to slide along it.
	www.hcor.net /postp592.html (1765 words)

	Bicycle Tech: Internal Gear Boxes Making a Comeback
		The thread talked about the application of internal gear transmissions and whether these alternative gearing systems have a place in the future of bicycling.
		The 2007 SRAM i-Motion 9 is a new internally geared hub – so new, that it’s not yet listed on the website (however, a 2007 manual in PDF form does exist).
		Over at Shimano, their comfort line is Nexus, again an internally geared hub.
	bicycletech.blogspot.com /2006/04/internal-gear-boxes-making-comeback.html (515 words)

	Travel bicycles by Bike Friday, manufacturer of high performance folding bicycles and folding bike accessories. (Site not responding. Last check: 2007-09-29)
		Fortunately, the gearing can be adjusted in a number of ways: with larger gears, a DualDrive internally geared hub, and with the new Capreo hub.
		The hub system is incredibly reliable and requires relatively low maintenance, but if a problem does incur, you may have difficulty finding a shop that knows how to fix the problem.
		The quality, weight and performance of the hub is consistent with Shimano’s reliable XT system while the standard 9-26 cassette is about the same weight and gear range as the XTR 12-34.
	www.bikefriday.com /main.cfm?fuseaction=news.article&ID=450&Category=Shop (512 words)

	Surly LHT (Site not responding. Last check: 2007-09-29)
		Since I was having frame work done anyhow, I decided to switch to horizontal dropouts so I can easily run a Shimano Nexus 8 internally geared hub.
		I won't go into real detail about the components, but the highlights are: TA Zephyr cranks (155 mm), stainless steel chainring (from Surly), Nexus 8 rear hub, XTR front hub, Brooks saddle, Burly Moose rack (holy cow it's solid!), Paul brakes (tons of brake adjustment and awesome power).
		Gear 8 is perfect for cruising on a flat road with those big slow tires...
	raven.subsume.com /SurlyWebPage.html (349 words)

	Coker skatepark photos (#4) - Top of ramp - Unicyclist Community
		I used a track hub and interchangeable sprockets on both sides of the hub, so that I can just flip the wheel around to change the gear.
		Right now I have it geared to give me the equivalent of about a 30.5" wheel on one side and a 37" wheel if I flip the wheel around.
		Riding a geared wheel on top of a pole is a lot different than riding the Coker...
	www.unicyclist.com /forums/showthread.php?t=36495 (746 words)

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