Easier Gearing on Older Three Speeds

There’s nothing like the comfort, reliability, and just plain fun of riding vintage three speed bicycles, especially those made by Raleigh and other U.K. manufacturers.  For decades, these bikes were the transportation of choice for the working class.  They are built to last, and their utility has already spanned across two centuries.  Properly cared for, these well built machines may outlast even our children’s children, and are a wonderful treasure to pass on to the future.

However, as built, these bikes are geared high and are difficult to ride uphill.  In practice, walking steep hills was the norm, as these bikes are also pretty heavy.

My 1950 Raleigh Sports Tourist, weighing in at 45 lbs., is no exception.  Its gear inch range is 47-84 with its original 19T cog and 46T chainring.  Using the bike in my hilly neighborhood has meant being in the right frame of mind and sufficiently rested to be willing to put forth the physical exertion required.  But, why not gear it lower and get more enjoyment out of the bike given the environment in which I ride?

Well, one reason is that it is a sort of major PITA to remove the rear wheel.  Owning a bike with a full chainguard means a few extra steps to rear wheel removal.  Fortunately I’ve never had a flat in all of the 15 years I’ve had this bike, so I’ve lucked out in that regard but have of course removed the rear wheel on the few times over the years when I’ve given the bike a complete overhaul.  It rarely needs servicing, just a few drops of oil in the hub every now and then, so I’ve had this, one of my oldest bikes, in the shop stand much less often than my other bikes.

But, it’s actually not that bad once you get started.  There are two screws at the back and bottom of the chainguard which when removed allow you to remove a back section of the guard, and then the wheel can be dropped out (after first disconnecting the indicator spindle from the cable of course).

And, to remove the rear wheel I’ve found it easiest to flip the bike upside down rather than hoist it into the work stand.  You can see what you are doing much easier, and there’s less likelihood of “losing” the chain inside the chainguard.  Even so, I like to place something there to keep the chain accessible, such as this wrench pictured above.

At this point, the fairly straightforward process of swapping the old cog for a new one with more teeth would be the next step.  However, you can see from the above photo that my cog is threaded to a threaded driver.  There aren’t 3 little notches which line up to the splines on the driver.  Uh oh!

Sturmey Archer began using splined drivers in their hubs in 1951, making swapping cogs relatively easy.  Because my Raleigh was made earlier, it has a threaded cog/driver, not a splined one.  So, an easy cog swap was out.  After doing some research, I concluded that I had two options if I wanted to lower the gearing:  remove the original cog and screw on a track cog (which is said to have the same threading) or swap out the driver for a newer splined driver.

Thinking that the simplest approach would be to simply unscrew the old cog and screw on a suitable replacement, I needed to find a way to hold the driver in place while using a chain whip (as I had already removed the driver from the hub).  Thanks to a helpful tip from bikesmithdesign.com I took a couple of matching Shimano 600 headset removal tools (I needed two to make the platform wide enough) and lined the handles up in my vice so I could place the slots between the driver’s “legs” over them.  It’s probably better to use aluminum bar stock as recommended, but my hack worked fine. A better approach would have been to leave the driver in the hub so that it’s still attached to the wheel, which provides more leverage. Trying it both ways I still couldn’t get the cog to unscrew, even after soaking it in some penetrating oil. It’s been on there for 72 years and doesn’t want to budge.

So, I switched to Plan B.

I harvested a splined driver from a 1978 hub, shown above, first removing the outer nuts and then the locknut and lock washer.  I had previously removed the cog, circlip, dust cap and spacers.

Then I put the left side axle in the vise and began to unscrew the cone on the right side.  The driver sits right underneath the cone and carries the bearing cup.  Removing the driver helps you to see why you must never do your cone adjustment from the right side:  the driver’s position is controlled by the spring underneath pushing up into the cone above.  It needs to be adjusted exactly as specified by Sturmey Archer so that the correct movement of the driver when the clutch is engaged by the shifter is achieved.

Making sure not to dislodge the plastic washer atop the clutch spring, you can remove the driver, but leave the clutch spring intact along with the washer sitting on top.  The recipient hub is going to get the driver, the dust cap, spacers, and circlip.  I also transferred the cone as well, since it was in better shape the original.

I carefully installed the new replacement driver onto the 1950 hub, and screwed the cone down finger tight, then backed it off 1/2 turn as per the S.A. instructions.  From there, the lock washer and locknut are installed.  I checked the hub for free play and then did a slight cone adjustment on the left side (NEVER ON THE RIGHT!), leaving just a tiny bit of free play, as recommended.

Then the exciting part:  installing the new cog.  Not knowing how much room I would have inside the chainguard I went with a 22T cog.  I didn’t want to risk having the chain rub against the inside of the guard.  So, fingers crossed that this one will work.  After noting the dishing on my original cog:  “bubble side down” I oriented this cog the same way.  I installed the dust cap underneath first, and found I also needed an extra spacer which I fortunately had on hand, pushed on the cog and snapped in the circlip.

After adding two chain links to accommodate the larger cog I tried mounting the wheel to first make sure that I had the right chain length.  The axle should sit comfortably in the middle of the dropout, which it does.  From there I installed the outer washers and nuts.  At this point, I turned the bike over and put it into the shop stand, as it was time to reinstall the hub spindle and check that the shifting was working and that there were no other issues such as a chain line problem or chain rub on the guard.  Fortunately, all was in order and shifting was perfect once I retuned it.

1951 Raleigh Catalog

My new gearing gives me 41-54-72 gear inches.  My first test ride gave me a glimpse of the fun I’m going to have.  The 54 is a comfortable “cruising gear”, which I define as an easy cadence on flats.  The low 41 gear, although NOT a 30, is still much better than it was, and the high gear of 72 is just fine as I really don’t need to blast down the hills.

The hub on this bike has always seemed almost self propelling.  It spins very well and has little friction, especially as compared to my other Sturmey Archer equipped bikes (older is better?).  I plan to spin my way into the coming seasons and hope that I’ve given this bike a chance to keep on spinning for another 70 years or more.

Hybrid Gearing

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Sachs Orbit 2 speed hybrid hub with 6 speed cassette

I became interested in hybrid gearing after acquiring my 1973 Jack Taylor Tourist, about 9 years ago.  The bike features a single front chainring, 6 speed cassette and a 2 speed Sachs Orbit internal hub.  That gives it 12 gears overall, with a good range for the kind of riding I do, as the internal hub’s lower gear is about a 33% reduction, which is quite significant. For awhile, I didn’t think much about this interesting arrangement, and instead just enjoyed riding the bike, and being able to do a substantial downshift while sitting still at a stop light.

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Sachs Orbit 2 speed hybrid hub with 6 speed cassette.

There are a number of ways to accomplish hybrid gearing.  You can forgo a front derailleur, and use an internal two or three speed hub to take the place of multiple chainrings.  You can also use multiple chainrings with an internal hub, and forgo the cassette/freewheel.  Or, you can be like Sheldon Brown and do both, achieving a 63 speed bicycle – his beloved “O.T.B.”  which used a 3 speed SA hub, a seven speed cassette, and 3 chainrings.  Doing the math:  3 x 7 x 3 = 63.  So with modern technology, let’s calculate the possibilities:  a 14 speed Rohloff hub, paired with an 11 speed cassette, with a triple chainring = 462 gears!  Probably that set up would be a mechanic’s nightmare, so if you really want this many gears, I suggest you purchase a continuously variable NuVinci hub – but be prepared to deal with quite a bit more than a couple of pounds of extra weight.

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Sachs Orbit hub – NOS early 90’s with two optional cassettes

There is really only one source on the internet for information about the Sachs Orbit 2 speed hybrid hub, and that of course is the Sheldon Brown site, with additional information and clarifications by bike guru John Allen.  One of the things I worried about with this hub on my Jack Taylor was being able to find replacement parts, given that the hub was so rare.  Fortunately, a while back I found a NOS Sachs Orbit hub, pictured above, which I could use as a replacement in case something went wrong.

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1973 Jack Taylor Tourist Sachs Orbit hybrid hub

Meanwhile, the original hub is working just fine, and needed only occasional lubrication with automotive oil.  I had sent the hub out for a rebuild nine years ago, and it is working perfectly, still.

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Info on the box of the replacement hub seems to indicate this is a 1992 hub

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Very pretty hub logo engraved into the hub shell

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Be careful with these spindles!

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The replacement hub I purchased is quite lovely, and has two different cassette options – for 5 or 6 speeds. The cassette cogs and spacers slip onto the freehub with tabs to line up the rings, except for the final smaller cogs, which screw onto the freehub.  As one pedals, these smaller cogs with screw-on threads will get tighter and tighter.

Because this replacement hub is so nice, I have been thinking about using it to build into an interesting wheel set for a road/commuter bike, rather than keeping it in reserve for spare parts. One of the convenient features of this hub is that it can be operated by pretty much any front derailleur shifter, as there are only two positions on the hub.  And, if something goes wrong with the hub on the Jack Taylor, maybe I will rethink hybrid gearing altogether.

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1973 Jack Taylor Tourist

The bike’s rear wheel was an alteration from its original 1973 build, and whether or not this rear wheel was built by the Taylor brothers is unknown.  However, I have noted that British bikes built in the 60’s through the 80’s sometimes featured hybrid gearing.  This was especially true for the boutique manufacturers of that era.  Sachs internal hub gears are considered on par with Sturmey Archer, and I will say that is true, based on my experience with riding this Jack Taylor. The hub has been totally reliable.

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This early 90’s Sachs Orbit 2 speed hybrid hub has 36 holes, so it could work with a number of possible rims.  It needs a bit of lubrication to bring it back to full glory, and if I end up needing to rebuild it, John Allen and Sheldon Brown will come the rescue.

1950 Raleigh Sports Tourist – 45 lbs of Riding Pleasure

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I recently cycled home from work on my 1950 Raleigh Sports Tourist.  The bike had been sitting at my office for a while.  One of the reasons I haven’t ridden it with greater frequency is that the full chain guard (“gearcase” for those who speak British) and the drive side crank arm contact each other with an annoying noise with each pedal stroke.  Previously, I had tried to solve this problem by mashing various parts of the gearcase with my hands to see if I could force it into a different position that would provide clearance for the crank arm.

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As I was noisily making my way up Clinton Street, I came upon a rider on a Mercian.  We chatted for a while and I learned he was riding an early 80’s model that a friend had given him as a frame (nice gift!), which he then built up.  That’s only the 2nd Mercian I have spotted in Pdx, aside from my own.  Interestingly, because my Raleigh is geared so high, I ended up surging past him in my big (but lowest) 52 gear inch as we began to climb the steeper hills, and so we parted company.

When I arrived home, sans heart attack, I put the bike into the shop stand, determined to solve the gearcase/crank arm clearance problem.  The first thing I did was to mark the position of the axle in the dropout and the adjuster on the shifter cable.  This way, I could restore the wheel and cable back to their current position – something which took a while to perfect so that the hub shifts correctly.

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One thing I’ve gotten questions about before is how to get the gearcase off the bike.  There are two pieces at the back of the gearcase which can be removed by unscrewing the bolts which attach them to the main part of the gearcase.  After that, there is a bracket which attaches the gearcase to the chainstay, plus a bolt which holds the front part of the gearcase, and attaches near the bottom bracket.  Once those are removed, then it’s a matter of re-positioning the gearcase and sliding the opening at the back through the narrowest part of the drop out.  The photos above show how this is done.

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Once I had the gearcase off, I took my mallet to it and tried straightening it out a bit.  Then, I tried various methods of altering the position of the gearcase once I re-mounted it to the frame, but nothing worked.

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Finally, I took my files and filed away a small section of the metal on the inside of the crank arm, to provide more clearance.  I didn’t want to take a lot of material off.  But with these solid steel crank arms, I probably have nothing to worry about.  Ultimately, I was successful in adjusting the gearcase cover to eliminate any contact with the crank arm.

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Since I had the pedals off, I thought it might be time to overhaul them. Their last overhaul was 8 years ago.  Sure enough, the grease was pretty dirty.  Fortunately, the brilliant design of the cone and lock washer made the process incredibly quick and easy.  The tabs on the back of the cone make it simple to adjust the cone to perfection.  Once adjusted, the cone’s tabs lock into position with the grooves on the lock washer.  If your adjustment needs a tweak or two, just loosen the nut and move the cone one notch at a time.  If only all pedals were designed this way!

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I headed out on the bike today and thoroughly enjoyed not only the new, silent drive train, but the amazing ride quality of this bike.  The steel frame and steel wheels absorb road shock very well, so that even the upright riding position does not transmit pain waves to your spine.  With the inertia of the heavy steel wheels, the bike really rolls once it gets going.  In my high gear, I have even passed a carbon fiber bicycle or two, much to their riders’ surprise.  The components, the paint, and the attention to detail in every aspect of how this bike was manufactured puts modern quality control to shame.

The bike responds to pedal strokes and never feels mushy or bogged down.  The geometry is perfect for the type of bike it is, and it does not wobble at slow speeds and provides for fun descents and excellent cornering at high speeds.  In fact, the ride quality of this bike is a sharp contrast to another 45 lb. machine I recently rode – the SoBi bicycles which are part of Pdx’s new Biketown bike share program.  Those bikes are made with large diameter aluminum tubing, and also feature an upright riding position, although much more extreme than that of the Raleigh.  The stiff aluminum frames, bad geometry and questionable component quality provide for a really unpleasant riding experience.

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It would be fun to see a bike share program which used quality vintage bicycles and de-emphasized modern technology (which serves as a barrier to those who cannot afford the latest internet device) as a way to introduce new riders to urban commuting. There are so many quality vintage bicycles out there. Find one and ride it!