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Search: Posts Made By: Jipe
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Forum: Folding Bikes
03-18-24, 11:28 PM
Replies: 32
Views: 3,774
Posted By Jipe

This is exactly the current situation of gravel...

This is exactly the current situation of gravel bikes: almost anything is called gravel bike, so that gravel is now meaningless!
Forum: Folding Bikes
03-18-24, 04:29 PM
Replies: 32
Views: 3,774
Posted By Jipe

Its not only about a drop bar, if the frame of...

Its not only about a drop bar, if the frame of this GB-2 is a real gravel frame, i.e. close to a cyclocross frame, its a different frame geometry that creates a different bike behavior.
Forum: Folding Bikes
03-18-24, 11:08 AM
Replies: 32
Views: 3,774
Posted By Jipe

The geometry of a real gravel bike (original...

The geometry of a real gravel bike (original concept, nowadays any offroad bike without suspension is called "gravel") is very different from the geometry of a MTB. The position on the bike is also...
Forum: Folding Bikes
03-14-24, 02:34 AM
Replies: 32
Views: 3,774
Posted By Jipe

Originally, gravel bikes were derivatives of...

Originally, gravel bikes were derivatives of cyclocross bikes with a dropbar but less sporty than cyclocross, with a more comfortable position and wider tires (cyclocross tire width is limited by the...
Forum: Folding Bikes
03-11-24, 11:42 PM
Replies: 46
Views: 1,593
Posted By Jipe

Making an aluminum lightweight crankset is very...

Making an aluminum lightweight crankset is very easy.

The challenge is to make a lightweight crankset that is still rigid enough!

There are nowadays many copies of the old, now discontinued,...
Forum: Folding Bikes
03-03-24, 04:12 PM
Replies: 2
Views: 189
Posted By Jipe

Looks very nice with this huge chainring. ...

Looks very nice with this huge chainring.

Your tire seems... tired!

FYI, the Ti Parts Workshop JIS squqre taper bottom bracket for Brompton has no tube, it might fit for your bike.
Forum: Folding Bikes
03-01-24, 11:31 AM
Replies: 76
Views: 43,411
Posted By Jipe

The problem of wobbling on the Birdy 3 was...

The problem of wobbling on the Birdy 3 was reported by a user I know who eventually bought an H&H adapter to replace the Litepro and didn't experience the same problem.

Now, on another bike...
Forum: Folding Bikes
03-01-24, 07:20 AM
Replies: 76
Views: 43,411
Posted By Jipe

There is a major other difference: the two first...

There is a major other difference: the two first 51-98mm and for Bird 2 3 tilt the bag frame to the front (bigger distance from the stem) what increases the cantilever effect while the third one K3...
Forum: Folding Bikes
03-01-24, 12:58 AM
Replies: 76
Views: 43,411
Posted By Jipe

This way of mounting on the head tube won't work...

This way of mounting on the head tube won't work with frames like the Birdy and Zizzo with a big main tube that cover most of the length of the head tube.

My experience from building several own...
Forum: Folding Bikes
02-28-24, 07:29 AM
Replies: 45
Views: 1,552
Posted By Jipe

The Mediterranean cost of Spain is a dry place,...

The Mediterranean cost of Spain is a dry place, little rain and the sea is usually relatively quiet, not like the ocean with also most of the time no or little wind. But the wind/air passing over...
Forum: Folding Bikes
02-28-24, 04:06 AM
Replies: 45
Views: 1,552
Posted By Jipe

In seaside places I mention where there are salt...

In seaside places I mention where there are salt problems, you do not see the salt, no visible salt deposit, but nevertheless, the atmosphere is salty.

This happen not only on the ocean coast, but...
Forum: Folding Bikes
02-28-24, 03:15 AM
Replies: 45
Views: 1,552
Posted By Jipe

I looked at the website you gave. I do not...

I looked at the website you gave.

I do not think that the problem is rain and humidity.

I also live in a rainy place, and even if I do not like the Brompton Sturmey Archer IGH, they are really...
Forum: Folding Bikes
02-27-24, 02:48 AM
Replies: 24
Views: 650
Posted By Jipe

There are many adapters like that with 2 collars,...

There are many adapters like that with 2 collars, the first one was designed by Bikegang sold by H&H for the Birdy and as usual it was (badly) copied by Litepro but still with 2 collars!
Forum: Folding Bikes
02-27-24, 12:56 AM
Replies: 24
Views: 650
Posted By Jipe

The adapter of Valeria is very thick and strong...

The adapter of Valeria is very thick and strong but you are right, the load is more cantilevered than on the original implementation of Brompton.

But there are much worse designs, you will surely...
Forum: Folding Bikes
02-26-24, 10:16 AM
Replies: 24
Views: 650
Posted By Jipe

My experience based on several small wheels bikes...

My experience based on several small wheels bikes (Brompton, Birdy, Moulton, Tern) is that its much better to attach the front bag or carrier to the head tube (so that it part of the main frame and...
Forum: Folding Bikes
02-22-24, 12:35 PM
Replies: 45
Views: 1,552
Posted By Jipe

Extensive testing always cost a lot of money. ...

Extensive testing always cost a lot of money. Fort several products, mode than development.

Smartphone is a bad comparison.

First, the development costs are shared between several companies,...
Forum: Folding Bikes
02-22-24, 03:02 AM
Replies: 25
Views: 1,256
Posted By Jipe

I do not see for what kind of real off road this...

I do not see for what kind of real off road this bike will be better than the GSD:
- for muddy trails, the mudguards are much too close to the tires and will quickly be full of mud, blocking the...
Forum: Folding Bikes
02-21-24, 05:39 AM
Replies: 25
Views: 1,256
Posted By Jipe

Yes, a huge long tail cargo with big wheels:...

Yes, a huge long tail cargo with big wheels:...
Forum: Folding Bikes
02-21-24, 02:52 AM
Replies: 45
Views: 1,552
Posted By Jipe

The Dahon Curl is a real innovative folding bike....

The Dahon Curl is a real innovative folding bike.

Its folding is inspired from the Brompton but unlike Brompton clones its improved and unlike Brompton clones its not a stupid copy of the Brompton...
Forum: Folding Bikes
02-19-24, 01:20 AM
Replies: 2,419
Views: 712,217
Posted By Jipe

WD40 is terrible for bearings, it should...

WD40 is terrible for bearings, it should absolutely be avoided.
Forum: Folding Bikes
02-18-24, 04:22 AM
Replies: 40
Views: 3,664
Posted By Jipe

This 10s Shimano Deore derailleur is also mounted...

This 10s Shimano Deore derailleur is also mounted on several Tern bikes with ETRTO406 wheels.
Forum: Folding Bikes
02-18-24, 01:52 AM
Replies: 2,419
Views: 712,217
Posted By Jipe

If its a Birdy 2, I think there is no grease...

If its a Birdy 2, I think there is no grease nipple on the rear swingarm bearing+axle like on the Birdy 3 ? Without that, the only possibility is to dismount the axle.
Forum: Folding Bikes
02-17-24, 06:22 AM
Replies: 11
Views: 404
Posted By Jipe

Brompton mount Schrader valve tubes.

Brompton mount Schrader valve tubes.
Forum: Folding Bikes
02-17-24, 04:34 AM
Replies: 127
Views: 4,074
Posted By Jipe

Its a forged one piece with the steerer and lower...

Its a forged one piece with the steerer and lower part of the hinge for the lower part of the stem, also forged one piece for the upper part of the hinge + stem tube.

On the not height adjustable,...
Forum: Folding Bikes
02-17-24, 03:12 AM
Replies: 127
Views: 4,074
Posted By Jipe

The steerer tube is short, not longer than the...

The steerer tube is short, not longer than the one of a classic fork (it goes only till the folding hinge) and its a one piece machined item with thick walls that integrate the lower part of the stem...
Forum: Folding Bikes
02-16-24, 12:17 PM
Replies: 127
Views: 4,074
Posted By Jipe

What many people of the forum, who only know the...

What many people of the forum, who only know the Birdy from some pictures seen on the web, do not know is that unlike Dahon and almost all other bikes, the Birdy folding stem is not only a stem, it...
Forum: Folding Bikes
02-16-24, 02:38 AM
Replies: 127
Views: 4,074
Posted By Jipe

Look at the user manual: safety issues are...

Look at the user manual: safety issues are explicitly pointed out with "Danger" and "Attention" warnings (and there are a lot, 36 "Danger" and 26 'Attention").

The stem replacement is not a safety...
Forum: Folding Bikes
02-15-24, 09:35 AM
Replies: 127
Views: 4,074
Posted By Jipe

As I wrote, the only consequence of not replacing...

As I wrote, the only consequence of not replacing the stem is a negative effect on your warranty (i.e., the optional extra legal 10 years frame warranty because after 3 years the legal 2 years...
Forum: Folding Bikes
02-15-24, 06:43 AM
Replies: 2,419
Views: 712,217
Posted By Jipe

If you don't know it, the Birdy front disc brake...

If you don't know it, the Birdy front disc brake is on the right side of the bike (to allow a more compact fold) and its position WRT. the center of the front hub is not standard (the distqnce...
Forum: Folding Bikes
02-15-24, 06:28 AM
Replies: 25
Views: 1,256
Posted By Jipe

Let see what Tern will announce next week. ...

Let see what Tern will announce next week.

But its clear that the folding bike market didn't grow like other bike market segments, the folding bike growth that several companies were expecting in...
Forum: Folding Bikes
02-15-24, 03:46 AM
Replies: 25
Views: 1,256
Posted By Jipe

Tern has a moved from the folding bike market to...

Tern has a moved from the folding bike market to the electric cargo bike market and earns now much more money with these electric cargo bikes than with folding bikes.

The GSD is a top seller for...
Forum: Folding Bikes
02-14-24, 03:26 AM
Replies: 127
Views: 4,074
Posted By Jipe

Sorry, I thought I answered your question. ...

Sorry, I thought I answered your question.

By adjustable, I guess you mean adjustable in height?

I haven't tested the higher positions, but on the lowest and one step higher, there is no flex....
Forum: Folding Bikes
02-13-24, 05:55 AM
Replies: 127
Views: 4,074
Posted By Jipe

The stem price is VAT included (for EU Birdy...

The stem price is VAT included (for EU Birdy Owners).

For the support material, workmanship hours that you think will be very expensive, you obviously don't know how the Birdy stem is mounted !
Forum: Folding Bikes
02-13-24, 01:56 AM
Replies: 2,419
Views: 712,217
Posted By Jipe

What type of Birdy do you have?

What type of Birdy do you have?
Forum: Folding Bikes
02-13-24, 01:53 AM
Replies: 127
Views: 4,074
Posted By Jipe

Riese & Müller and Pacific Cycles aren't...

Riese & Müller and Pacific Cycles aren't competing against each other, they are partners.

There are commercial agreements between Riese & Müller and Pacific Cycles, the several Birdy frames were...
Forum: Folding Bikes
02-12-24, 10:39 AM
Replies: 127
Views: 4,074
Posted By Jipe

A mid range folder for 190€ !?...

A mid range folder for 190€ !? https://www.kemperfietsen.nl/birdy-stuur/stuurpen-sport-birdy-iii/

There is no mandatory stem change, its only needed if you want to benefit of the 10 years frame...
Forum: Folding Bikes
02-12-24, 06:41 AM
Replies: 127
Views: 4,074
Posted By Jipe

The problem is that your knowledge of the Birdy 3...

The problem is that your knowledge of the Birdy 3 is only Google based, not real bike knowledge!

Look, the saddle-handlebar distance of a Riese & Müller Birdy 3 with a Sport stem as coming out of...
Forum: Folding Bikes
02-12-24, 03:02 AM
Replies: 127
Views: 4,074
Posted By Jipe

The saddle-distance value you gave for the Birdy...

The saddle-distance value you gave for the Birdy 3 is wrong because you took the shortest one and not the factory one of Riese & Müller bikes (Pacific Cycles Birdy meant for Asiatic market are tuned...
Forum: Folding Bikes
02-12-24, 02:53 AM
Replies: 2,419
Views: 712,217
Posted By Jipe

This Sunrace hub is not an IGH, its a hub for a...

This Sunrace hub is not an IGH, its a hub for a cassette, the Riese & Müller Birdy Touring has a pure 10s derailleur transmission (while the Pacific Cycles Birdy Touring is a 3x8s with an IGH, quite...
Forum: Folding Bikes
02-11-24, 11:36 AM
Replies: 21
Views: 4,007
Posted By Jipe

Yes, the Birdy 3 tensionner works perfectly which...

Yes, the Birdy 3 tensionner works perfectly which wasn't the case of the previous one that was a derailleur cage extension.

But it cannot be mounted on the Brompton due to the very special shape...
Forum: Folding Bikes
02-11-24, 11:28 AM
Replies: 127
Views: 4,074
Posted By Jipe

Anybody with some engineering knowledge knows...

Anybody with some engineering knowledge knows that aluminum is sensitive to fatigue.

As said, Brompton put the same kind of recommendation for the aluminum handlebar and aluminum hinge clamps of...
Forum: Folding Bikes
02-11-24, 06:14 AM
Replies: 21
Views: 4,007
Posted By Jipe

You mean the one below with carbon derailleur...

You mean the one below with carbon derailleur cage I guess?

Its working because the teeth difference between the smallest and biggest cog is very small and because the chain length is adjusted to...
Forum: Folding Bikes
02-11-24, 05:35 AM
Replies: 127
Views: 4,074
Posted By Jipe

The Birdy sold in the EU is covered by a 2 year...

The Birdy sold in the EU is covered by a 2 year warranty like any product sold in the EU.

Does the Fsir Spin manufacturer provide a 2 year warranty, does he take any responsibility if something is...
Forum: Folding Bikes
02-11-24, 03:43 AM
Replies: 21
Views: 4,007
Posted By Jipe

The original 2s and 4s Brompton derailleur are...

The original 2s and 4s Brompton derailleur are crap. A real derailleur like the Ultegra is just not comparable to the one of Brompton.

But no standard derailleur can take the slack of the chain...
Forum: Folding Bikes
02-10-24, 05:48 AM
Replies: 127
Views: 4,074
Posted By Jipe

Your curved stem is different from the one I saw...

Your curved stem is different from the one I saw in the video, it increases the saddle-handlebar distance (Tyrell made a different stem for the Yve that also increased the saddle-handlebar distance...
Forum: Folding Bikes
02-09-24, 04:40 AM
Replies: 127
Views: 4,074
Posted By Jipe

So this bike previously claimed to be the perfect...

So this bike previously claimed to be the perfect folding bike compared to the crap Swift, suddenly requires a re-design?

Actually, the reason why the Fsir Spin (and several others folding bikes)...
Forum: Folding Bikes
02-08-24, 04:50 PM
Replies: 127
Views: 4,074
Posted By Jipe

In 2015, a Dutch company tried to sell the Fsir...

In 2015, a Dutch company tried to sell the Fsir Spin in The Netherlands, it was a total failure but understandable when you see how an average dutch guy sits on a Fsir Spin!
...
Forum: Folding Bikes
02-08-24, 04:27 PM
Replies: 118
Views: 4,628
Posted By Jipe

14" is a size with a limited choice of tires and...

14" is a size with a limited choice of tires and mainly cheap, low end tires. I wouldn't buy a bike with this wheel size.
Forum: Folding Bikes
02-08-24, 04:20 PM
Replies: 127
Views: 4,074
Posted By Jipe

What do you mean by telescopic, do you mean...

What do you mean by telescopic, do you mean adjustable in height?

There are 3 different stem for the Birdy 3, all are folding, but 2 are also adjustable in height, the difference between them is...
Forum: Folding Bikes
02-08-24, 09:40 AM
Replies: 127
Views: 4,074
Posted By Jipe

Yes, there are both not telescopic and telescopic...

Yes, there are both not telescopic and telescopic stems for the Birdy 3.
Showing results 1 to 50 of 1000
 


 
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