That's very nice and interesting. I am still (after months) waiting for a
resolution to my S3X problem -- shop ordered 36 when I ordered 32; but
hoping I'll have a 3d, 3-sp-fixed wheel for the newly modified '03 custom
errand bike before the summer is out.


On Sun, Aug 9, 2015 at 12:29 PM, Montclair BobbyB <montclairbob...@gmail.com
> wrote:

> Finally got my 2-speed wheel laced up and installed on my S1  (BIG THANKS
> TO JOHN SHARPE!!!!!)
>
> I took it out on a semi-hilly ride, and WOW... this moves along the flats
> at a good clip, but just a quick flip of the thumb shifter and I can
> actually climb a long hill that would otherwise have me pushing the
> bike...  VERY COOL!!!
>
> The lower gear is great for hills or for tooling around at low speed.
> TOTAL BLAST TO RIDE!!!
>
>
> <https://lh3.googleusercontent.com/-we3W3LKKEIQ/VcebVw1DSNI/AAAAAAAAFJY/bw5T_tQD9r4/s1600/FullSizeRender%2B%252815%2529.jpg>
>
>
> <https://lh3.googleusercontent.com/-d6iySHJeNzs/VcebZhnbSVI/AAAAAAAAFJg/YiLnx-tS63I/s1600/FullSizeRender%2B%252816%2529.jpg>
>
>
> On Tuesday, May 19, 2015 at 9:36:45 PM UTC-4, JohnS wrote:
>>
>> I'll start with a little back ground on the Bendix modification. I found
>> this review about a year ago and it was what got me in the market for a
>> QB/S1 since the Bendix requires an OLD of 120mm. As you all know there
>> isn't another production bike quite like it with this spacing. I've been
>> riding the QB with the Bendix for about three months, so this is a short
>> term review, will provide a more comprehensive review a the end of the
>> season.
>>
>> http://www.63xc.com/genng/bikesmith.htm
>>
>> The upside to the modified Bendix hub are the following:
>> 1. Cruising gear is fixed, nearly 100% efficiency, same as any other
>> fixed gear bike. Rides just like one.
>> 2. Shift on the fly, no need to get off the bike, loosen wheel, move
>> chain... so on.
>> 3. Down shift is 25% of the cruising gear. For me this means I'm using
>> the cruising gear like normal, up and down rolling hills, easily 90% of the
>> ride, if not more. The low gear is there for steep up hills or sustained
>> head winds. As an example I got in a 33 mile ride on Sunday afternoon, at
>> the most 1 to 2 miles were in the low gear. All the rest were about working
>> the fixed gear.
>> 4. Simplicity, few moving parts within the hub and as Bobby B. noted,
>> they are stout. I've rebuilt a couple Sturmey Archer AW 3 speed hubs and
>> the modified Bendix has a fraction of the parts.
>>
>> As with everything there are downsides:
>> 1. DO NOT DOWN SHIFT AT SPEED! This is a two speed fixed hub, meaning you
>> shift from one fixed gear to another fixed gear. Going from a cadence of 80
>> to 100 could throw you off the bike. I found this out the hard way, luckily
>> I rode it out and didn't crash, but it was pretty scary. Up shift isn't as
>> critical, just ease up some.
>> 2. This is a bolt on hub, you need to carry wrenches to take the wheel
>> off should you need to fix a flat.
>> 3. It is heavy, at around 3 pounds. At least the weight is at the hub so
>> the rotational forces don't play into the energy to move it.
>> 4. The 18 tooth cog is integral to the hub and can not be changed. You
>> have to change your chain ring to make adjustments to the gear ratio.
>> 5. The cog requires an 1/8 inch chain.
>> 6. Requires some sort of friction mode shifter, but the choice is yours.
>> I'm using an old school Campy down tube shifter and cable guide, very
>> minimal set up, forward is for the low gear, back is the cruising gear.
>> 7. Because of the shift cable, I'm not likely to loosen and move the
>> wheel to take advantage of a crank with two chain rings.
>> 8. No conversion to a free wheel, but I suppose you could use the hub as
>> is with the coaster brake.
>> 9. Bearing are not sealed. Will require regular maintenance. I'm using
>> Phil Wood tenacious oil on the gears and the two bearings near the gears. I
>> used Park grease on the left bearings.
>> 10. This is not an off the shelf part. The hub needs to be welded.
>> Fortunately I found a professional welder who does the MIG welding for $25.
>>
>> Overall, having a two speed fixed gear bike is great! I live in a hilly
>> area and the low gear just makes fixed gear riding a really fun experience.
>> Without it, I would be limited to less hilly roads, having to walk up more
>> hills or would have to switch back to a geared bike. A geared bike would
>> not be the end of the world, but my preference for the past four years is
>> to ride fixed.
>>
>> JohnS
>>
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