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Search: Posts Made By: Jipe
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Forum: Folding Bikes
09-19-21, 02:36 PM
Replies: 9
Views: 342
Posted By Jipe

That's the problem: none of these touring tires...

That's the problem: none of these touring tires exists in ETRTO451.

In the list of ETRTO451 tires of Modern Bike, the best option is probably the Panaracer Minits Tough which is the stronger...
Forum: Folding Bikes
09-16-21, 09:15 AM
Replies: 9
Views: 342
Posted By Jipe

The choice of tire in ETRTO451 is very limited,...

The choice of tire in ETRTO451 is very limited, mainly narrow road tires, nothing like a Schwalbe Marathon.
Forum: Folding Bikes
09-09-21, 03:07 PM
Replies: 1,608
Views: 479,716
Posted By Jipe

The current chain tensionner arm placed around...

The current chain tensionner arm placed around the chainring limit the chainring size.
Forum: Folding Bikes
09-06-21, 03:11 AM
Replies: 3
Views: 225
Posted By Jipe

Indeed, wheel sizes in inches are confusing and...

Indeed, wheel sizes in inches are confusing and should be avoided. The reason is that the size indicated is the diameter including the tire that changes with the tire width.

ETRTO sizes gives the...
Forum: Folding Bikes
08-30-21, 02:24 AM
Replies: 1,608
Views: 479,716
Posted By Jipe

The slightly longer gear range of the Birdy...

The slightly longer gear range of the Birdy Rohloff vs. my Brompton Rohloff is due to the slightly bigger wheels and mainly the bigger/wider/higher Big Apple tires.
Forum: Folding Bikes
08-21-21, 04:47 AM
Replies: 39
Views: 2,370
Posted By Jipe

For commuting, one important point is what you...

For commuting, one important point is what you need to carry with you for the commuting and how to carry it.

Road bike most of the time do not offer anything to carry on the bike, no rack mount,...
Forum: Folding Bikes
08-17-21, 02:56 AM
Replies: 1,608
Views: 479,716
Posted By Jipe

81,1" is really short, 78" is even worse ! I...

81,1" is really short, 78" is even worse !

I have a Brompton with Rohloff (54x13), the 19” to 102” range is really excellent. 102" is about 25% longer than 81.1" !
Forum: Folding Bikes
08-16-21, 03:41 PM
Replies: 1,608
Views: 479,716
Posted By Jipe

Current Rohloff are less noisy on their 7 lowest...

Current Rohloff are less noisy on their 7 lowest gear than older ones. I have two bikes with a Rohloff, he first one of 2021 even if it now has a lot of km remain noisier than the second one of mid...
Forum: Folding Bikes
08-15-21, 10:50 AM
Replies: 1,608
Views: 479,716
Posted By Jipe

One benefit you will also have when swapping to a...

One benefit you will also have when swapping to a Rohloff is longer gears because with a 11-32t cassette and a 52t chainring, 52x11 is quite short, the R&M Touring Birdy has a 9-32t cassette with the...
Forum: Folding Bikes
08-15-21, 03:12 AM
Replies: 1,608
Views: 479,716
Posted By Jipe

Indeed, it depends where you live. Even in...

Indeed, it depends where you live.

Even in cities, there are places with short but very steep streets where the 52x32 2.21m, the lowest gear of the Birdy Touring, is too long

For those places,...
Forum: Folding Bikes
08-12-21, 05:02 AM
Replies: 21
Views: 1,236
Posted By Jipe

The main problem is the concept: regeneration...

The main problem is the concept: regeneration doesn't produce enough energy for enough electric assist and the full integration of the assist in the rear wheel only allow a small capacity battery.
...
Forum: Folding Bikes
08-12-21, 12:01 AM
Replies: 1,608
Views: 479,716
Posted By Jipe

The titanium Birdy is factory equipped with a...

The titanium Birdy is factory equipped with a 52-36 front and Shimano 105 front and rear derailleur (rear is a RD-5800-GS, front FD-R7000, the frame has a front derailleur mount for a braze-on front...
Forum: Folding Bikes
08-11-21, 03:04 PM
Replies: 39
Views: 2,370
Posted By Jipe

And 12 years later, if I understand well, the...

And 12 years later, if I understand well, the Dahon D7 is still riding?

Congratulation!
Forum: Folding Bikes
08-11-21, 10:45 AM
Replies: 1,608
Views: 479,716
Posted By Jipe

On the Birdy Rohloff, the dropout is different...

On the Birdy Rohloff, the dropout is different and the chainline too to accommodate the wider chainline of the Rohloff hub (+ of course the rotating grip and dual cables furnished with the Rohloff...
Forum: Folding Bikes
08-11-21, 03:43 AM
Replies: 1,608
Views: 479,716
Posted By Jipe

The Birdy with internal gear hub like the Birdy...

The Birdy with internal gear hub like the Birdy Rohloff and the R&M Birdy City have a different value of chainline and it might be more difficult to fit a front derailleur on hem than on Birdy with a...
Forum: Folding Bikes
08-10-21, 10:04 AM
Replies: 1,608
Views: 479,716
Posted By Jipe

The Birdy GT is a derailleur Birdy, it has the...

The Birdy GT is a derailleur Birdy, it has the chainline distance of a derailleur bike which is compatible with a front derailleur

There are several bike pictures, b do not see any Birdy picture...
Forum: Folding Bikes
08-10-21, 04:03 AM
Replies: 1,608
Views: 479,716
Posted By Jipe

What model of Birdy do you have ? What is...

What model of Birdy do you have ?

What is the brand of the front derailleur mount used for the conversion ?

You could maybe post some pictures of it.
Forum: Folding Bikes
08-10-21, 03:57 AM
Replies: 2
Views: 443
Posted By Jipe

The Brooks B67 is higher than the original...

The Brooks B67 is higher than the original saddle.

The height of the folded Brompton is defined by its height at the saddle.

So, with a higher saddle (or a longer seatpost), the folded height...
Forum: Folding Bikes
08-07-21, 12:28 PM
Replies: 39
Views: 22,607
Posted By Jipe

Ben enlarged my Brompton titanium rear triangle...

Ben enlarged my Brompton titanium rear triangle to 135mm and provided a Rohloff rear wheel for it.

Nice, clean job.

Its now riding since 5 year without any problem.

The only problems I...
Forum: Folding Bikes
08-04-21, 09:19 AM
Replies: 1,608
Views: 479,716
Posted By Jipe

To know if it will work, you need to measure the...

To know if it will work, you need to measure the chainline.

R&M adapts the chainline of the Birdy according to the rear transmission, its different for the different Birdy with different IGH and...
Forum: Folding Bikes
08-03-21, 05:28 AM
Replies: 5
Views: 551
Posted By Jipe

Indeed, to be ordered from Velogical. ...

Indeed, to be ordered from Velogical.

Advantage vs. a hub dynamo, zero drag when not in use, ultra lightweight, cheaper than replacing the front wheel by a hub dynamo front wheel.

For the...
Forum: Folding Bikes
08-03-21, 03:28 AM
Replies: 5
Views: 551
Posted By Jipe

If you will commute to work during the dark...

If you will commute to work during the dark often, the best solution is to have a front hub dynamo and dynamo front+rear lights instead of battery lights.

Alternatively, you can mount a tiny...
Forum: Folding Bikes
08-02-21, 03:10 PM
Replies: 4
Views: 469
Posted By Jipe

None of them! The main problem of the...

None of them!

The main problem of the Brompton is the lack of comfort due partly to vibrations transmitted by the stiff wheels with high pressure tires.

Grips with a high vibration insulation...
Forum: Folding Bikes
08-01-21, 03:38 PM
Replies: 1,608
Views: 479,716
Posted By Jipe

Pedalkraft has a lot of Birdy spare parts, maybe...

Pedalkraft has a lot of Birdy spare parts, maybe also old ones ! (https://pedalkraft.de/birdy-ersatzteile)

The rear hub is a standard 135mm OLD hub.
Forum: Folding Bikes
08-01-21, 05:44 AM
Replies: 1,608
Views: 479,716
Posted By Jipe

you should look on eBay Kleinanzeigen in Germany...

you should look on eBay Kleinanzeigen in Germany (https://www.ebay-kleinanzeigen.de/s-birdy/k0) there are often Birdy parts like wheels. Some sellers will ship to UK.

Example:...
Forum: Folding Bikes
07-31-21, 02:59 PM
Replies: 21
Views: 1,236
Posted By Jipe

Actually, its a claim of Zehus. The Zehus...

Actually, its a claim of Zehus.

The Zehus all in one rear wheel is a quick (and probably dirty) solution to transform any bike in an eBike.

Several manufacturers use the Zehus solution.

All...
Forum: Folding Bikes
07-27-21, 03:11 AM
Replies: 72
Views: 21,731
Posted By Jipe

The cogs sequence is important because the...

The cogs sequence is important because the grooves of the hyperglide system (or other brands similar system) follow each other on every cog.

If non sequential cogs are used, these grooves do not...
Forum: Folding Bikes
07-27-21, 12:38 AM
Replies: 72
Views: 21,731
Posted By Jipe

Yes, the same exist for cassette, for example the...

Yes, the same exist for cassette, for example the Shimano hyperglide and hyperglide plus.
Forum: Folding Bikes
07-26-21, 03:18 PM
Replies: 72
Views: 21,731
Posted By Jipe

Yes, they work, but not as well as these matched...

Yes, they work, but not as well as these matched chainrings !

With these matched chainrings, upshifting is so soft that you do not even feel that the chain is moving to the bigger chainring, no...
Forum: Folding Bikes
07-26-21, 08:00 AM
Replies: 72
Views: 21,731
Posted By Jipe

The pins aren't enough. The two chainrings...

The pins aren't enough.

The two chainrings are specially designed in a pair to make the chain mount on the bigger chainring easy and ultra fast.

Its not only marketing, it works amazingly well....
Forum: Folding Bikes
07-26-21, 02:40 AM
Replies: 72
Views: 21,731
Posted By Jipe

On modern bike gearing, upshifting with the front...

On modern bike gearing, upshifting with the front derailleur is helped a lot by pins and grooves on the bigger chainring (each brand has its own tricks and commercial name for that).

If your...
Forum: Folding Bikes
07-26-21, 02:36 AM
Replies: 13
Views: 5,922
Posted By Jipe

Yes, of course, its like it has been for many...

Yes, of course, its like it has been for many years with the Brompton M before Brompton changed the stem and handlebar for a new model.
Forum: Folding Bikes
07-25-21, 03:11 PM
Replies: 13
Views: 5,922
Posted By Jipe

Its the previous M type stem and handlebar: the...

Its the previous M type stem and handlebar: the handlebar is higher and the stem is shorter, the overall height of stem+handlebar is similar.
Forum: Folding Bikes
07-25-21, 02:31 AM
Replies: 72
Views: 21,731
Posted By Jipe

Yes, that's a reason, but it causes the...

Yes, that's a reason, but it causes the derailleur problem because the inner chainring is too close to the frame.

Maybe an old front derailleur for a triple chainring could do the job ?
Forum: Folding Bikes
07-24-21, 03:04 PM
Replies: 72
Views: 21,731
Posted By Jipe

Its because you kept the middle and inner...

Its because you kept the middle and inner chainring of a triple crankset instead of keeping the outer and middle chainring or used a real double or compact crankset.
Forum: Folding Bikes
07-22-21, 07:20 AM
Replies: 21
Views: 1,236
Posted By Jipe

I guess you saw that Vello is trying to attract...

I guess you saw that Vello is trying to attract investor to raise funds for their company?
Forum: Folding Bikes
07-22-21, 03:55 AM
Replies: 1,608
Views: 479,716
Posted By Jipe

I can buy Ridea and Hubsmith Birdy disc front hub...

I can buy Ridea and Hubsmith Birdy disc front hub separately.

For the rear hub, as said the problem is to have a freewheel body that accepts a smaller cog with less than 11t. Besides Sunrace and...
Forum: Folding Bikes
07-21-21, 11:54 PM
Replies: 1,608
Views: 479,716
Posted By Jipe

It depends of what type of cassette you want to...

It depends of what type of cassette you want to mount.

For a small wheel bike and without a bigger than usual chainring (60 or 65t that anyway isn't compatible with the new Birdy chain tensionner)...
Forum: Folding Bikes
07-21-21, 03:16 AM
Replies: 35
Views: 14,745
Posted By Jipe

I now have been riding with my Birdy titanium...

I now have been riding with my Birdy titanium with ETRTO406/20" wheels since more than 6 months.

My experience is that with very similar wheels (same hubs, same type of spokes, same type of tires,...
Forum: Folding Bikes
07-20-21, 02:27 AM
Replies: 12
Views: 736
Posted By Jipe

With a 50mm wide tire and 135mm rear spacing, the...

With a 50mm wide tire and 135mm rear spacing, the derailleur cage is very close to the side of the tire.

The chance that an object can hit the cage is therefore very small because the object must...
Forum: Folding Bikes
07-19-21, 03:13 PM
Replies: 29
Views: 4,881
Posted By Jipe

Which is understandable: Bike Friday is a small...

Which is understandable: Bike Friday is a small company.

I guess that when SRAM announced that they will stop the Dual Drive and that they won't support customers with spare parts anymore (shame...
Forum: Folding Bikes
07-19-21, 09:53 AM
Replies: 12
Views: 736
Posted By Jipe

The difference between 50mm and 35mm tire is...

The difference between 50mm and 35mm tire is 15mm. The overall diameter of the ETRTO305 with 50mm tire is about 405mm while the one for the ETRO349 with 35mm tire is about 419mm, diameter difference...
Forum: Folding Bikes
07-19-21, 02:45 AM
Replies: 12
Views: 736
Posted By Jipe

There are 14mm difference on the diameter, so...

There are 14mm difference on the diameter, so only 7mm lower to the ground = 18mm ground clearance. It should be OK.

The 34t cassette isn't an option as the Ultegra RD-6800-GS doesn't allow a 34t...
Forum: Folding Bikes
07-18-21, 10:51 AM
Replies: 12
Views: 736
Posted By Jipe

On a 16" ETRTO349 Bompton size wheel with 35mm...

On a 16" ETRTO349 Bompton size wheel with 35mm wide tires (Continental Contact Urban 35x349) I use a Shimano 11s Ultegra RD-6800-GS with a 9-32 cassette that doesn't hit the ground (something like...
Forum: Folding Bikes
07-02-21, 10:50 PM
Replies: 8
Views: 782
Posted By Jipe

Curious to have your feedback about it. There...

Curious to have your feedback about it. There aren't many reviews about riding Helix (position on the bike, comfort, performances...) most feedback are about its design, weight, components,...
Forum: Folding Bikes
07-02-21, 01:04 PM
Replies: 8
Views: 782
Posted By Jipe

Wasn't your Helix supposed to be delivered in...

Wasn't your Helix supposed to be delivered in June?
Forum: Folding Bikes
07-02-21, 12:01 AM
Replies: 8
Views: 782
Posted By Jipe

It depends how the bike folds. If when the...

It depends how the bike folds.

If when the bike is folded the discs are on the outer side or not.

If you look at Helix, the rear disc is between the wheels and protected, the front not.

On...
Forum: Folding Bikes
06-28-21, 02:01 AM
Replies: 16
Views: 1,564
Posted By Jipe

Gearing is definitely important. For wheel...

Gearing is definitely important.

For wheel size, its not wheel size alone, its wheel size+suspension (or not)+tire width.
Forum: Folding Bikes
06-27-21, 03:33 AM
Replies: 16
Views: 1,564
Posted By Jipe

I hate riding with a backpack, especially when...

I hate riding with a backpack, especially when the weather is warm !

All my folding bikes have something to carry luggage's on the bike, either a Brompton front block (I adapted a Brompton front...
Forum: Folding Bikes
06-23-21, 11:53 PM
Replies: 2,628
Views: 796,320
Posted By Jipe

Actually, the Tubolito aren't bad. They have...

Actually, the Tubolito aren't bad. They have advantages: much smaller to carry them, much less weight.

But some claims aren't true: they aren't puncture proof as claimed.

And there were...
Showing results 1 to 50 of 663
 


 
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