Classic top tube shifter | The Shed | A Pashley Guvnor Forum

 
Current User: Guest Login Register
Please consider registering


Register? | Lost Your Password?

Search Forums:


 






Minimum search word length is 3 characters – Maximum search word length is 84 characters
Wildcard Usage:
*  matches any number of characters    %  matches exactly one character

Classic top tube shifter

Add a New Topic Reply to Post
UserPost

11:58 am
16, July, 2013


Forrester

Berlin

Member

posts 57

Gentleman,

I am thinking of modifying my single speed Guvnor to a three speed machine.

The shifter should be mounted on the top tube with a pulley mounted on the seatpost bolt.

I think I saw this on Corky's bike.

 

My Questions is: where can I get such a shifter and pulley.

 

Save Rides

Carsten

5:26 pm
16, July, 2013


Corky

Wetherby, West Yorkshire

Member

posts 272

Post edited 5:28 pm – 16, July, 2013 by Corky


Carsten – I simply moved the existing pulley thats mounted on the bottom of the seat tube. With regard to finding a shifter I got mine on ebay – search for sturmey archer quadrant shifter. There's one on ebay now….

 

http://www.ebay.co.uk/itm/Vint…..3f270b0e2f

 

I'll see if I can dig out a photo of the routing for you.

 

Corky

5:32 pm
16, July, 2013


Corky

Wetherby, West Yorkshire

Member

posts 272

Post edited 5:33 pm – 16, July, 2013 by Corky


Carsten – you can just see the pulley at the top of the seat tube – the cable follows the line of the seat tube perfectly. With the change of routing I had to re-dial in the gears put that was fairly straight forward using the adjustment toggle on the cable. I also think I bought a new cable as well. I loved the new changer but alas I sold the bike in order to get the bigger sized double top tube frame.

 

Corky

 

8:17 am
17, July, 2013


Forrester

Berlin

Member

posts 57

Corky, did you refurbish the shifter especially the clamp looks like new?

Can I use the standard SA X-RD3 hub?

 

Thank you for the details

Save rides

Carsten

10:56 am
17, July, 2013


Corky

Wetherby, West Yorkshire

Member

posts 272

No refurbishment – just popped it on as it was and used the same sa x rd3 hub. All i did was replace the trigger changer with the quadrant changer.

11:49 am
25, July, 2013


Forrester

Berlin

Member

posts 57

Corky,

my Guvnor is now equiped with a 3 gear hub.

But other than planned I decided on a gear shifter mounted at the bottom of the seatpost just above the seat tube.

Sturmey Archer offer this alternative.

Having the shifter hidden underneath the saddle is kind of a secret turbo charger.

I used this solution to keep the sleek line of the bike.

 

Photos will follow.

 

Carsten

6:02 pm
26, July, 2013


Forrester

Berlin

Member

posts 57

Gentleman,

this is how the single speed machine looks like after upgrading to three gears with a shifter "hidden" beneath the seatpost.

Chainring is 46T – sprocket is 18T

The SA clamp measures 31.8 with a shim for 27.2 mm.

In this position the second gear – 100% – is active.

On the left axle side I kept the wingnut from the single speed hub.

 

Safe rides

Carsten

6:47 pm
26, July, 2013


Dodger

Derbyshire

Moderator

posts 1770

Excellent solution Mr Carsten…. very neat well done Sir

 

Dodger

8:31 pm
26, July, 2013


Guvnor of NY

Member

posts 52

Hey I like that a lot. Well done !!

8:44 pm
26, July, 2013


Forrester

Berlin

Member

posts 57

Thank you Gentleman.

Because shifting gears not so often but having something in the back when a hill – up or down – is on route I though this is a good solution.

I was really pleased by the variant mounting parts SA offered with the X-RD3 hub.

 

But one question I have: the rear hub is only spinning properly if the brake cable has no tension at all, so that the breaking power is very weak. If I increase the tension power the spinning wheel stops at a certain point.

Is this normal, does the break has to wear in?

Did any one of you made that erxperience as well?

 

Carsten

9:09 pm
26, July, 2013


Dodger

Derbyshire

Moderator

posts 1770

Post edited 9:12 pm – 26, July, 2013 by Dodger (FKA EmGee CeCe)


Good evening Sir… I find the balance is key. The point where the brake works perfectly is just a fraction off a turn away from causing the brake to drag. So its worth spending sometime fine tuning the rear adjuster. Making sure the front brake adjuster is set neutral as well always helped for me.(until I changed over to Dia compe which doesnt have any adjustment)

 

Dodger

7:17 am
29, July, 2013


Forrester

Berlin

Member

posts 57

Mr. Dodger, I understand your point.

But the issue is that the wheel is spinning properly lets say 340 degrees and in the remaining 20 degrees it is stocked because of the brake.

I hope this will go away after wearing in the brake.

 

Carsten

11:26 am
6, August, 2013


Adam

Manchester

Admin

posts 1939

Mroning Herr EB29,

What about finding the largest hill in the area and riding to the top (testing your extra gears) and then a few hard stops on the way down to try and bed your drums in?

Out of interest can you feel the extra weight in the the speed hub?

Regards,

Adam

8:14 pm
7, August, 2013


Forrester

Berlin

Member

posts 57

Good evening Mr. Adam,

thank you for the advice.

I did a sort of hard stops as you mentioned with the result that it is getting better.

 

With regards to the weight it is more or less the same because while replacing the hub I also replaced the Brooks Flyer Special by the original B17. We are talking about 0.5 kg.

 

By the way, I changed my cryptic forum name to the more sounding

Mr. Forrester.

 

Save rides

10:18 am
8, August, 2013


Forrester

Berlin

Member

posts 57

Mr. Adam, to be more precise to what I wrote yesterday I have to add the following.

The weight stays the same but the center of gravity is now lower; the 0.5 kg moved from the saddle to the hub.

So that might improve the stability.

Also because the increase in weight of the rear wheel happened in the center of the wheel it is not noticable while accelerating.

I experienced a very noticable difference with regard to accelertion after replacing the wheelset of a racing bike from clincher to tubular. Same brand, same hubs, some spokes but different rim and tire.

The difference in weight was 0.1 kg for each wheel.

 

So it really depends on where weight is being added or reduced.

6:51 pm
16, August, 2013


Forrester

Berlin

Member

posts 57

I found out by coincidence why the rear wheel was not spinning properly and why I could not adjust the break point.

The reason why was that the space between the left side of the hub and the drop out was to narrow. The effect was that the bolt which fixes the left seat stay on the drop out was squezzed against the bolt which fixes the brake lever on the hub.

With a spacer on the axle the brake is now working fine.

 

Just to let you know.

11:18 am
19, August, 2013


Theodorus P

Stratford Upon Avon

Member

posts 68

Guten Morgen Herr Forrester

I have just ordered a Stem Shifter as I have always been 'concerned' about the handlebar shifter and the overall look of the Guvnor and your 'solution' looks perfect (to me anyway!).

Was it a difficult fit, and if so have you any tips and advice for an incredibly stupid man!.

Declan

11:39 am
19, August, 2013


Forrester

Berlin

Member

posts 57

To mount the shifter was not difficult at all

If you need some additional photos or instructions, please let me know.

 

But you have to make sure to get the shifter with a clamp for the seatpost.

I ordered it from Practical Cycles:

 

http://www.ebay.co.uk/itm/Stur…..2ec98ecbc4

4:20 pm
26, August, 2013


Theodorus P

Stratford Upon Avon

Member

posts 68

Done it, my first major modification and my shifter is now on my seat post.

Strangely I was desperate to get this done as I am not a fan of the Sturmey Shifter on the handlebars, just doesn't look right to me however once I started the job I felt incredibly nervous as I took the original bits off, almost as if I really shouldnt be doing this.

The job only took me about ten minutes which was actually very dissapointing because I was hoping it would last me a few hours, cause me much head scratching, annoyance and eventually see me storming into my local bike shop to have them re hash the whole job at a cost of thousands but it didn't, far too easy and works as it should.

Yes its a bit awkward to change gear as it sits under the saddle but I feel it looks much neater and as my lady friends constantly tell me style always comes at a cost and style my boy is everything.

And now I am to celebrate with a joyous cup of tea, you are all welcome to join me!.

Declan

3:12 pm
27, August, 2013


Forrester

Berlin

Member

posts 57

Well done.

I am pleased to hear that you find the function of the shifter more than acceptable and style wise being on the right place; even if moving the shifter was not really a challenge – sorry about that.

 

I took the Guvnor for a 3 day trip from Madgeburg to Dresden following the Elbe-Radweg last week. It was a good opportunity to test the practicallity of the shifter place. It worked perfect for me. It is kind of a hidden switch.

 

The cup of tea is waiting.

Reply to Post

Reply to Topic:
Classic top tube shifter

Guest Name (Required):

Guest Email (Required):

NOTE: New Posts are subject to administrator approval before being displayed

Smileys
Confused Cool Cry Embarassed Frown Kiss Laugh Smile Surprised Wink Yell
Post New Reply

Guest URL (required)

Math Required!
What is the sum of:
7 + 4
   


 

Comments on this entry are closed.