Bike Forums

Go Back  Bike Forums > Search Forums
Reload this Page >

Search Results

Register
FAQ
Calendar
Search
Today's Posts
Mark Forums Read
Vendor Directory
Notices
 
Page 1 of 20
1
2
3
11
Last »
Search: Posts Made By: Jipe
Showing results 1 to 50 of 1000
Search took 0.09 seconds.
Forum: Folding Bikes
04-12-24, 02:15 AM
Replies: 44
Views: 3,466
Posted By Jipe

Continental has excellent fast new tires with...

Continental has excellent fast new tires with very high puncture protection that exists in 50x406-2.00x20, 55x406-2.2x20 and 62x406-2.5x20 called eContact Plus they are much better than the Super...
Forum: Folding Bikes
04-08-24, 03:04 AM
Replies: 17
Views: 1,060
Posted By Jipe

130mm rear OLD is the race road bike OLD for...

130mm rear OLD is the race road bike OLD for bikes with rim brakes. There is no standardized 130mm OLD for disc brakes.

135mm is the MTB rear OLD standardized both for rim brakes (mainly V-brakes...
Forum: Folding Bikes
04-07-24, 10:06 AM
Replies: 44
Views: 3,466
Posted By Jipe

If you mean ETRTO406 for 20", the best trade off...

If you mean ETRTO406 for 20", the best trade off currently are the Continental Contact Urban, there are 3 width available, 32x406, 42x406 and 50x406:
- low rolling resistance.
- pretty high...
Forum: Folding Bikes
04-07-24, 01:28 AM
Replies: 44
Views: 3,466
Posted By Jipe

The Verge is the model that had the biggest...

The Verge is the model that had the biggest problem of broken frames, it was not some isolated bad welded frames, the recall cover bikes produced during more than 4 year (January 2012 to April 2016),...
Forum: Folding Bikes
04-07-24, 01:18 AM
Replies: 2,948
Views: 1,016,791
Posted By Jipe

No a blueish color of the welding. The...

No a blueish color of the welding.

The problem with a triple chainring+BWR+4 cogs is the low usability consequence of the 3 commands and the slow gear change due to the BWR and poor 4s Brompton...
Forum: Folding Bikes
04-06-24, 10:05 AM
Replies: 2,948
Views: 1,016,791
Posted By Jipe

The problem with oxygen contaminated titanium...

The problem with oxygen contaminated titanium welding most of the time happen inside the tubes, some oxygen remaining inside the tube while welding.

When this happen, you cannot see anything from...
Forum: Folding Bikes
04-06-24, 09:56 AM
Replies: 2,948
Views: 1,016,791
Posted By Jipe

I mean no crappy BWR hub too, a real 11s...

I mean no crappy BWR hub too, a real 11s derailleur with a real cassette. And no triple crankset, another remnant of the past same as the 4s cogset and derailleur.

On the Birdy, the only...
Forum: Folding Bikes
04-06-24, 03:48 AM
Replies: 2,948
Views: 1,016,791
Posted By Jipe

The specific Brompton frame concept with the rear...

The specific Brompton frame concept with the rear wheel folding right under the main frame tube has the drawback that any overall wheel diameter increase also increases the wheelbase, the folded...
Forum: Folding Bikes
04-06-24, 02:15 AM
Replies: 2,948
Views: 1,016,791
Posted By Jipe

There was a huge evolution in steel alloy while...

There was a huge evolution in steel alloy while nothing happenec for titanium, the alloy used for bike frame is the same as 20 years ago.

Titanium is a great material but welding is a major issue:...
Forum: Folding Bikes
04-05-24, 03:23 PM
Replies: 17
Views: 1,060
Posted By Jipe

Same experience with 9t cog: its to obtain a high...

Same experience with 9t cog: its to obtain a high enough gear inch when riding very fast but its not used often so higher wear and lower efficiency aren't issues.

The solution I use is SRAM XD...
Forum: Folding Bikes
04-05-24, 05:42 AM
Replies: 2,948
Views: 1,016,791
Posted By Jipe

My experience with Schwalbe tires in ETRTO406...

My experience with Schwalbe tires in ETRTO406 (Marathon, Big Apple, Big Apple Plus, Big Ben Plus, MotoX, Pick-up, Marathon Racer folding, Durano, Durano Plus, Ultremo, Pro-One) is that they all were...
Forum: Folding Bikes
04-05-24, 01:39 AM
Replies: 2,948
Views: 1,016,791
Posted By Jipe

The choice of ETRTO507 was indeed a marketing...

The choice of ETRTO507 was indeed a marketing choice with the simplistic argument bigger is closer to full size wheels and as such better (they even claimed that its safer).

There is little...
Forum: Folding Bikes
04-03-24, 03:36 PM
Replies: 2,948
Views: 1,016,791
Posted By Jipe

The use of a BWR IGH (heavy, low efficiency, slow...

The use of a BWR IGH (heavy, low efficiency, slow gear changes, inertia...) on the T-line is a nonsense!

This bike should have a real 11s cassette + real derailleur just like Helix.

For the...
Forum: Folding Bikes
04-03-24, 03:54 AM
Replies: 2,948
Views: 1,016,791
Posted By Jipe

ETRTO507 (there are several other 24" sizes,...

ETRTO507 (there are several other 24" sizes, ETRTO520, ETRTO540) was a BMX wheel size. There are plenty of tires but most of them are wide tires 50mm or wider.

Helix made a wrong decision when...
Forum: Folding Bikes
04-02-24, 03:19 PM
Replies: 2,948
Views: 1,016,791
Posted By Jipe

Front bag: 10kg but its possible to put more. ...

Front bag: 10kg but its possible to put more.

Rear, I don't know, never loaded the rear heavily.
Forum: Folding Bikes
04-02-24, 09:53 AM
Replies: 44
Views: 3,466
Posted By Jipe

For the behavior of a bike on rough surfaces and...

For the behavior of a bike on rough surfaces and bad roads (cobbles, potholes...), what is important is the relative overall wheel diameter difference, some values:
- Road bike 28x622 about 678mm
-...
Forum: Folding Bikes
04-02-24, 07:26 AM
Replies: 44
Views: 3,466
Posted By Jipe

Verge X11: ETRTO451x28 overall diameter about...

Verge X11: ETRTO451x28 overall diameter about 451+(2*28) = 507mm
T-line: ETRTO349x35, overall diameter about 349+(2*35) = 419mm

Difference -88mm = -3.46 inches = 17% smaller.

An aluminum...
Forum: Folding Bikes
04-02-24, 04:04 AM
Replies: 47
Views: 35,181
Posted By Jipe

Found out that this old news about Tern recall...

Found out that this old news about Tern recall was still online: (https://www.bicycleretailer.com/recalls/2016/04/26/tern-expands-recall-some-bikes-over-frame-concerns#.Vx_nWt8pDqA)
Forum: Folding Bikes
04-02-24, 04:00 AM
Replies: 2,948
Views: 1,016,791
Posted By Jipe

Also wider MTB tires like the Vee Tire Co Crown...

Also wider MTB tires like the Vee Tire Co Crown Gem 57x355.

Several BMX tires in 55x355 (the problem as always with BMX tires is the level of puncture protection).
Forum: Folding Bikes
04-02-24, 12:46 AM
Replies: 2,948
Views: 1,016,791
Posted By Jipe

I agree with you, these two very close wheel...

I agree with you, these two very close wheel sizes is a stupidity.

But its like that and the problem is that ETRTO349 was a Brompton size still mainly used on the Brompton which is limited to...
Forum: Folding Bikes
04-01-24, 11:50 PM
Replies: 2,948
Views: 1,016,791
Posted By Jipe

About the rear rack: - On the Brompton, the...

About the rear rack:
- On the Brompton, the rear rack use is very limited because anything wider than the rack will be hit with the heels while pedaling, so its not compatible with rear pannier. ...
Forum: Folding Bikes
04-01-24, 09:19 AM
Replies: 2,948
Views: 1,016,791
Posted By Jipe

A Riese & Müller Birdy 3 Touring with 10s...

A Riese & Müller Birdy 3 Touring with 10s derailleur will be faster than the T-line and as fast than Helix but much more comfortable due to its 50mm wide tires and full suspension (it rides also...
Forum: Folding Bikes
04-01-24, 05:15 AM
Replies: 2,948
Views: 1,016,791
Posted By Jipe

I didn't mention comfort in the drawback of the...

I didn't mention comfort in the drawback of the T-line and Helix because both have this problem: both have relatively narrow tires (35mm for the T-line, the frame should accept 40mm but there is only...
Forum: Folding Bikes
04-01-24, 04:03 AM
Replies: 2,948
Views: 1,016,791
Posted By Jipe

These two bikes are very different, both have...

These two bikes are very different, both have strong points and weaknesses:
- T-line is really lightweight, it weight much less than Helix Ultralight. Helix, even the Ultralight, is an heavy bike...
Forum: Folding Bikes
03-31-24, 04:19 PM
Replies: 61
Views: 7,129
Posted By Jipe

Tern, the bike manufacturer, officially...

Tern, the bike manufacturer, officially recognized the manufacturing problem and issued a bike recall (there were explanations about that recall on the Tern website but theses pages were removed),...
Forum: Folding Bikes
03-31-24, 03:58 PM
Replies: 61
Views: 7,129
Posted By Jipe

Several Tern models of these years (the used one...

Several Tern models of these years (the used one for which the discussion was started was from 2013), including the X30, had a manufacturing problem (and maybe a design problem) that was eventually...
Forum: Folding Bikes
03-31-24, 03:39 AM
Replies: 144
Views: 4,447
Posted By Jipe

Exorbitantly priced folders designed and...

Exorbitantly priced folders designed and manufactured by the White Man are mainly bought by the Yellow Man since the main market for high end Moulton is Japan :D

BTW, you can add a number 4 very...
Forum: Folding Bikes
03-30-24, 10:35 AM
Replies: 144
Views: 4,447
Posted By Jipe

https://www.youtube.com/watch?v=27xoHVjK6PA ...

https://www.youtube.com/watch?v=27xoHVjK6PA

https://www.youtube.com/watch?v=TXpq9iI51kw
Forum: Folding Bikes
03-27-24, 10:15 AM
Replies: 144
Views: 4,447
Posted By Jipe

Price increased since I bought mine from...

Price increased since I bought mine from Velorution in London in 2017 (these shops also disappeared since then)!

I discovered that actually almost nobody knows what it is and nobody knows the...
Forum: Folding Bikes
03-27-24, 07:21 AM
Replies: 144
Views: 4,447
Posted By Jipe

Its overpriced bike number 3, you forgot that I...

Its overpriced bike number 3, you forgot that I mentioned my Moulton Speed: 10K£ + 2K€ for wheelset+brakes+saddle+pedals upgrade (not any Litepro component on it) :D
Forum: Folding Bikes
03-27-24, 04:18 AM
Replies: 144
Views: 4,447
Posted By Jipe

I agree with you, what is important is that a...

I agree with you, what is important is that a bike fits your needs and provides riding pleasure.

The price has no importance unless whats make you happy is not riding your bike but having the...
Forum: Folding Bikes
03-26-24, 07:53 AM
Replies: 144
Views: 4,447
Posted By Jipe

Your live in US, its easy to find Greenspeed...

Your live in US, its easy to find Greenspeed Scorcher in the US (several recumbent bike shops have them), it seems there is quite some clearance around your old Stelvio tires and your bike has...
Forum: Folding Bikes
03-26-24, 07:16 AM
Replies: 144
Views: 4,447
Posted By Jipe

For those who don't know, maybe some explanation...

For those who don't know, maybe some explanation about the Greenspeed Scorcher 40x349 and 40x406.

These tires were specially developped for race use to be mounted on the Greenspeed Aero race...
Forum: Folding Bikes
03-26-24, 12:27 AM
Replies: 144
Views: 4,447
Posted By Jipe

Look at the 3 tires types characteristics...

Look at the 3 tires types characteristics (thread, width, pressure...) and you will see that my feelings fully match what Schwalbe has measured and is explaining in the link I posted.

Besides the...
Forum: Folding Bikes
03-25-24, 11:42 PM
Replies: 144
Views: 4,447
Posted By Jipe

The tire structure is a key element for the tire...

The tire structure is a key element for the tire behavior.

To make a fair comparison between a wider and narrower tire, the tire structure should be the same.

The second element is pressure. On...
Forum: Folding Bikes
03-25-24, 04:36 PM
Replies: 144
Views: 4,447
Posted By Jipe

I had a very bad experience with ETRTO406...

I had a very bad experience with ETRTO406 Tubolito for narrow tires (28x406): 3 leaked slowly without possibility to locate the place where they were leaking because its not possible to put pressure...
Forum: Folding Bikes
03-25-24, 10:24 AM
Replies: 144
Views: 4,447
Posted By Jipe

Wim Schermer is dutch guy and is a velomobile...

Wim Schermer is dutch guy and is a velomobile user (he has a Quest).

Its tire tests are dedicated for tires used on velomobiles who have small wheels on the font (most have ETRTO406).

The...
Forum: Folding Bikes
03-25-24, 05:52 AM
Replies: 144
Views: 4,447
Posted By Jipe

It depends of course of the tires! If you...

It depends of course of the tires!

If you put heavy wide ETRTO406 tires, it won't do the job.

Even on hills, if you mount a lightweight fast wide tire on a ETRTO406, it will be faster than...
Forum: Folding Bikes
03-25-24, 05:16 AM
Replies: 144
Views: 4,447
Posted By Jipe

I fully agree: ETRTO406 + 50mm wider (or even...

I fully agree: ETRTO406 + 50mm wider (or even wider) fast tires is better than ETRTO451 + 1 3/8 tires.

The overall wheel diameter is almost the same (less than 3% difference) and wide tires are...
Forum: Folding Bikes
03-24-24, 04:08 PM
Replies: 3
Views: 255
Posted By Jipe

I also use my Brompton off-road. It can do...

I also use my Brompton off-road.

It can do it but there are two problems:
- if the trail is rocky with stones and holes, its pretty uncomfortable due to the high pressure and relatively narrow...
Forum: Folding Bikes
03-19-24, 04:26 AM
Replies: 50
Views: 5,213
Posted By Jipe

OK, I didn't knew that its a reuse of an existing...

OK, I didn't knew that its a reuse of an existing frame and not a real gravel frame geometry.
Forum: Folding Bikes
03-18-24, 11:28 PM
Replies: 50
Views: 5,213
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: 50
Views: 5,213
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: 50
Views: 5,213
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: 50
Views: 5,213
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: 50
Views: 2,298
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: 248
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: 43,823
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: 43,823
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: 43,823
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...
Showing results 1 to 50 of 1000
 
Page 1 of 20
1
2
3
11
Last »


 
Forum Jump

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.