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Search: Posts Made By: JRat
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Forum: Folding Bikes
11-03-23, 07:30 AM
Replies: 2,423
Views: 725,087
Posted By JRat

Afterthought: Using some fibreglass mesh tape...

Afterthought: Using some fibreglass mesh tape such as https://www.amazon.co.uk/APT-Tape-Reinforcement-Heat-Resistance-Insulation/dp/B09HY1R2V7 instead of wire could be a neater solution. First apply...
Forum: Folding Bikes
11-02-23, 04:41 AM
Replies: 2,423
Views: 725,087
Posted By JRat

I've just done a similar repair to a pedal in...

I've just done a similar repair to a pedal in which the plastic was splitting. There's a loop of green wire (plastic coated steel - what I could quickly find) with the overlapping ends twisted to...
Forum: Folding Bikes
10-31-23, 05:50 AM
Replies: 2,423
Views: 725,087
Posted By JRat

Cracks take time to grow to a length that can...

Cracks take time to grow to a length that can result in failure. It's useful to be aware of the potential problem and periodically examine for possible cracks. Also listen out for any creaks or...
Forum: Folding Bikes
09-27-22, 01:23 AM
Replies: 2,423
Views: 725,087
Posted By JRat

Fatter tyres need a longer kickstand as the bike...

Fatter tyres need a longer kickstand as the bike is raised by the increase in the tyre size. A few mm difference in tyre size can usually be accommodated by accepting a different angle of tilt. Many...
Forum: Folding Bikes
02-13-22, 02:47 AM
Replies: 2,423
Views: 725,087
Posted By JRat

Thanks for this information. I was thinking of...

Thanks for this information. I was thinking of resurrecting that project when I have time and inclination. One of the problems I previously encountered was the likely need to dismantle the cranks and...
Forum: Folding Bikes
10-24-21, 11:52 AM
Replies: 2,423
Views: 725,087
Posted By JRat

That's another name for it.

That's another name for it.
Forum: Folding Bikes
10-24-21, 01:40 AM
Replies: 2,423
Views: 725,087
Posted By JRat

Enjoy.:) Shifting will further improve with use...

Enjoy.:) Shifting will further improve with use and the hub itself will become quieter. Make sure that the Ex-box is fully packed with grease. I find that this helps provide easier shifting.
Forum: Folding Bikes
09-09-21, 10:23 AM
Replies: 2,423
Views: 725,087
Posted By JRat

I haven't tried using a larger chainring and...

I haven't tried using a larger chainring and wonder if this would affect the foldability. My calculation suggests that extra 6 teeth increases the chainring diameter by about 24mm and you could do a...
Forum: Folding Bikes
08-29-21, 02:36 PM
Replies: 2,423
Views: 725,087
Posted By JRat

The Birdy Rohloff is supplied with 52T / 13T...

The Birdy Rohloff is supplied with 52T / 13T which gives gearing of 19.9" to 104.4"and I'm planning to change the sprocket to 14T which drops the gearing to 18.4" - 97" which is very close to the...
Forum: Folding Bikes
08-16-21, 10:54 AM
Replies: 2,423
Views: 725,087
Posted By JRat

I agree that if you've already got a 56T...

I agree that if you've already got a 56T chainring and no very steep hills then it would be best to keep that chainring.

Any of gears 1 to 7 of a Rohloff hub are noisier than gears 8 to 14 as an...
Forum: Folding Bikes
08-16-21, 03:35 AM
Replies: 2,423
Views: 725,087
Posted By JRat

I agree. While the Alfine 11 is more than double...

I agree. While the Alfine 11 is more than double the cost of the Nexus 8 this difference is a relatively small proportion of the total bike cost. I briefly considered putting an Alfine 11 onto a...
Forum: Folding Bikes
08-15-21, 01:36 AM
Replies: 2,423
Views: 725,087
Posted By JRat

15% hills need a good gearing range. I can just...

15% hills need a good gearing range. I can just get up a 15% hill in 3rd gear on my Birdy Rohloff and like to have a couple of gears in reserve for headwind / extra load / tired legs.
Forum: Folding Bikes
08-10-21, 11:53 AM
Replies: 2,423
Views: 725,087
Posted By JRat

See https://www.facebook.com/theGreenBasikal/ ....

See https://www.facebook.com/theGreenBasikal/ . In particular see https://www.facebook.com/theGreenBasikal/photos/pcb.4530392330317803/4530392216984481 (note the comment about a longer axle).
Forum: Folding Bikes
08-04-21, 01:18 AM
Replies: 2,423
Views: 725,087
Posted By JRat

Are there spacers on your bottom bracket? If so,...

Are there spacers on your bottom bracket? If so, how are they arranged? These photos show that the Birdy Rohloff (white) has no spacer on the left side whereas the Birdy City (blue) with 9 speed...
Forum: Folding Bikes
08-01-21, 01:46 PM
Replies: 2,423
Views: 725,087
Posted By JRat

I think that some of the people who sell Birdy...

I think that some of the people who sell Birdy bikes might have some spare parts although not listed on the internet. However, have you tried servicing the freehub? See, for example,...
Forum: Folding Bikes
05-24-21, 11:39 AM
Replies: 2,423
Views: 725,087
Posted By JRat

Thanks for the update. The original chain might...

Thanks for the update. The original chain might have felt tight due to the springing of the chain tensioner but, if you've left some slackness in the new chain then check that it doesn't come off...
Forum: General Cycling Discussion
05-24-21, 11:34 AM
Replies: 58
Views: 6,527
Posted By JRat

I've got all my bikes fitted with Ergotec AHS...

I've got all my bikes fitted with Ergotec AHS bars https://www.amazon.co.uk/ergotec-AL6061-T6-Handlebar-Aluminium-Comfort/dp/B006QSCY1I which are effectively straight bars with large removable...
Forum: Folding Bikes
05-17-21, 03:21 PM
Replies: 2,423
Views: 725,087
Posted By JRat

Most chainring spiders are made such that one...

Most chainring spiders are made such that one chainring can be fitted on the inside and another on the outside with the spacing correct for a front derailleur). The Shimano Nexus hub has a relatively...
Forum: Folding Bikes
05-16-21, 08:24 AM
Replies: 2,423
Views: 725,087
Posted By JRat

I'm still under the 10 post limit to be able to...

I'm still under the 10 post limit to be able to post photos.

I have my Birdy Rohloff ready for action with the Humpert Ergotec AHS handlebars which provide extra comfort on longer rides by...
Forum: Folding Bikes
05-08-21, 03:46 PM
Replies: 2,423
Views: 725,087
Posted By JRat

I can confirm that the chainring offset is...

I can confirm that the chainring offset is different between the two bikes as they should be as the Nexus hub has a smaller chainline offset than the Rohloff hub. The crank length appears to be the...
Forum: Folding Bikes
04-28-21, 02:11 PM
Replies: 2,423
Views: 725,087
Posted By JRat

I have abandoned my project to put a front...

I have abandoned my project to put a front derailleur on the Birdy City. Getting the bottom bracket unscrewed to enable moving spacers from left to right side was proving to challenging as it's not...
Forum: Folding Bikes
04-23-21, 10:02 AM
Replies: 2,423
Views: 725,087
Posted By JRat

Rather than disturb the chainring with its...

Rather than disturb the chainring with its associated chain guards how about using a bigger sprocket on the hub? The supplied sprocket is 16T so an 18T sprocket reduces the gearing by about 12% which...
Forum: Folding Bikes
04-21-21, 02:11 PM
Replies: 2,423
Views: 725,087
Posted By JRat

The Ridea front derailleur clamp was delivered...

The Ridea front derailleur clamp was delivered today so I did an trial fit of the clamp and the Shimano FD-5700 derailleur. This revealed that the chainrings need to be moved out by several...
Forum: Folding Bikes
04-06-21, 03:52 AM
Replies: 2,423
Views: 725,087
Posted By JRat

I've now tried that braze-on clamp from Amazon UK...

I've now tried that braze-on clamp from Amazon UK (B07T4KTZBD) and agree that it won't work. The problem is that the part holding the rear clamp fixing bolt conflicts with the rear triangle. This...
Forum: Folding Bikes
04-05-21, 02:24 PM
Replies: 2,423
Views: 725,087
Posted By JRat

That clamp has already arrived and I see your...

That clamp has already arrived and I see your point about the anti-rotation tab being flimsy but it's probably only there to keep things in alignment while the bolt is tightened. My current objective...
Forum: Folding Bikes
04-04-21, 03:57 AM
Replies: 2,423
Views: 725,087
Posted By JRat

Thank you for the advice and suggestions....

Thank you for the advice and suggestions. However, as I'm in UK I've decided to first try what is available here so I've ordered a 2-piece front clamp unit (item B07T4KTZBD from Amazon UK) as it's...
Forum: Folding Bikes
04-02-21, 11:09 AM
Replies: 2,423
Views: 725,087
Posted By JRat

I'm another new Birdy owner who has read through...

I'm another new Birdy owner who has read through much of the valuable discussion in this thread. I bought the Birdy City (European model with Nexus 8 gears) in the hope that I can add a second,...
Showing results 1 to 27 of 27


 
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