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Search: Posts Made By: Redbullet
Showing results 1 to 50 of 445
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05-18-22, 01:18 PM
Replies: 7
Views: 251
Posted By Redbullet

Totally agree. They probably saved 10-20 EUR in...

Totally agree. They probably saved 10-20 EUR in production costs and 10-20 g in bike weight. But in time, the cost for the user is way, way bigger...
05-18-22, 12:52 PM
Replies: 7
Views: 251
Posted By Redbullet

I have just learned the pattern: While riding...

I have just learned the pattern:
While riding loose headset, bearing cases “hammer” the headset tapered faces and slowly destroy them. Furthermore, the compression ring performs very small moves...
05-12-22, 02:29 PM
Replies: 7
Views: 251
Posted By Redbullet

Thanks for the detailed explanation. All the...

Thanks for the detailed explanation.
All the best
05-12-22, 01:37 PM
Replies: 7
Views: 251
Posted By Redbullet

Headset questions – road bike, carbon

Questions below might look stupid, but I can’t find mechanics in my area to deal with such topics related to a carbon road bike.

1. How do you call the cups that are pressed inside a head tube and...
05-08-22, 02:08 PM
Replies: 52
Views: 1,186
Posted By Redbullet

Thanks very much for the explanations, I really...

Thanks very much for the explanations, I really understood all and help a lot.
I decided not to replace the fork. Not only that it is expensive, but I think the old one is not yet critically...
05-07-22, 04:26 PM
Replies: 52
Views: 1,186
Posted By Redbullet

Wow! Thanks, although it seems to complicate a...

Wow! Thanks, although it seems to complicate a little. It looks like the that collar was not properly mounted. I think the collar is not pressed down directly by the spacers, but by the top of the...
05-07-22, 01:09 PM
Replies: 52
Views: 1,186
Posted By Redbullet

Sorry for insisting, it looks that I just start...

Sorry for insisting, it looks that I just start to learn some things about the forks and headsets :).
The part in the photo below is the one that grove in the fork at that level - I understand it is...
05-07-22, 05:40 AM
Replies: 5
Views: 217
Posted By Redbullet

Thanks. Old "Columbus" and Enve sound Ok. I'll...

Thanks.
Old "Columbus" and Enve sound Ok. I'll do my homework, to decide whether and how I change it.
With regards to the reasons of the issues (especially the mark at the contact with the headset)...
05-07-22, 05:28 AM
Replies: 52
Views: 1,186
Posted By Redbullet

Thanks. I am balancing between a new fork...

Thanks.

I am balancing between a new fork and preserving the actual… But what about the mark at the contact with headset? Wall thickness here was reduced with 0.1-0.15mm.
If this does not mean...
05-06-22, 03:23 PM
Replies: 9
Views: 770
Posted By Redbullet

They do have, in my opinion, other very...

They do have, in my opinion, other very interesting features as well: you can populate your peloton with bots which you can tailor as you want around your desired w/kg. You draft them, they draft you...
05-06-22, 01:33 PM
Replies: 5
Views: 217
Posted By Redbullet

Light carbon fork replacement (Road)

Hello,

I recently had a post regarding the stem digging around 0.1mm in the carbon steerer of a road bike. Recently I also found a circular mark at steerer contact with the upper part of the...
05-03-22, 11:17 AM
Replies: 52
Views: 1,186
Posted By Redbullet

Thanks. Lower marks are deeper: the difference...

Thanks.
Lower marks are deeper: the difference of 0.1-0.13 mm in diameter exists only at the level of the red point, generated during previous period of using 35mm of spacers, 3-4 years / 25000 km....
Forum: Road Cycling
05-02-22, 03:16 PM
Replies: 19
Views: 582
Posted By Redbullet

I use an older version of this, with aluminum...

I use an older version of this, with aluminum fork, on a smart trainer and a few times as a replacement of main bike for a few real rides. A durable bike, all good for the price, except for...
05-02-22, 02:30 PM
Replies: 52
Views: 1,186
Posted By Redbullet

No, I said I had 35mm and got this issue within...

No, I said I had 35mm and got this issue within around 3 years - some 25000+ km. Then I reduced to 30mm and I got some new scratches within around 1 year - some 5000-10000 km, but it looks to me that...
05-02-22, 02:10 PM
Replies: 52
Views: 1,186
Posted By Redbullet

No, the stem edges are not quite sharp, it is...

No, the stem edges are not quite sharp, it is brand stem - Ritchey. I am sure that the reason of the issue is the high flex of the steerer forward, during stand-up pedaling and strong brake on...
05-02-22, 01:12 PM
Replies: 52
Views: 1,186
Posted By Redbullet

Ok, I disassembled for pictures. - 3 pictures...

Ok, I disassembled for pictures.
- 3 pictures (taken from right, front and left).
The arrow above shows the mark of stem bottom edge when I had 35mm spacers. The arrow below shows the new scratch...
05-01-22, 12:52 PM
Replies: 52
Views: 1,186
Posted By Redbullet

No, that one is missing in my case. I only have...

No, that one is missing in my case. I only have the shape of the stem sculpted, only at the bottom edge of the stem and only in front of the steerer. One shape of 0.1mm depth made during the period...
05-01-22, 03:29 AM
Replies: 52
Views: 1,186
Posted By Redbullet

I should disassemble the system I am not sure...

I should disassemble the system I am not sure that I can take such a quality picture to show a dent of 0.1 mm, but "rm-rf" posted a link above with the general issue. My issue is very similar with...
04-30-22, 03:50 PM
Replies: 52
Views: 1,186
Posted By Redbullet

If that tool correctly calculates, considering...

If that tool correctly calculates, considering available angles of stems similar to mine, it would mean increasing angle from 6 to 17 degrees in order to decrease spacers height from 30 to 15 mm. I...
04-30-22, 02:23 PM
Replies: 52
Views: 1,186
Posted By Redbullet

Thanks. No. My steerer is under built. It is...

Thanks.

No. My steerer is under built. It is a 6.5kg bike L size, with some weight savings coming from very light frame and fork. The expander is thick and correctly installed and the torque was...
04-30-22, 02:02 PM
Replies: 52
Views: 1,186
Posted By Redbullet

I think the reason is that I have too big height...

I think the reason is that I have too big height of spacers (35 and then 30mm - not recommended for CF) and this allows steerer to bent too much, which leads to high concentration of forces.
The...
04-30-22, 01:37 PM
Replies: 52
Views: 1,186
Posted By Redbullet

Mine has a special spacer above and the steerer...

Mine has a special spacer above and the steerer extends around 2mm above the stem.

I was thinking about a workaround for my issue, although a little expensive and not very elegant (see the sketch...
04-29-22, 03:10 PM
Replies: 52
Views: 1,186
Posted By Redbullet

Thanks everybody for the answers. Under normal...

Thanks everybody for the answers.
Under normal variable pressure over the handlebar (see the sketch below), the elastic steerer will successively bent (imperceptibly) forward and recover, generating...
04-28-22, 03:30 PM
Replies: 52
Views: 1,186
Posted By Redbullet

Stem digging in the steering tube

Hello,

Grateful if somebody has a solution for the issue below (sorry for the bad quality sketch… :))

It is about a road bike with steering tube diameter of 28.5 mm, carbon fiber.
Because of...
04-24-22, 03:31 PM
Replies: 5
Views: 254
Posted By Redbullet

Sorry, I should have mentioned from the start: it...

Sorry, I should have mentioned from the start: it is a road bike. It is a relatively cheap road bike, used on a trainer.

Thanks
04-24-22, 02:52 PM
Replies: 5
Views: 254
Posted By Redbullet

Thanks very much for the answer. I had some...

Thanks very much for the answer.
I had some difficulties in finding all 9 speeds elements, but I managed to find some parts for 10 speeds - Shimano Tiagra: 10 speeds right shifter plus 10v cassette...
04-23-22, 03:22 PM
Replies: 5
Views: 254
Posted By Redbullet

Microshift 8s vs Shimano ST R3030 9v

Grateful if somebody can advise:

I run a Microshift 3x8 on a bike for trainer. The right shifter (8v) looks damaged, as it shifts down 2-3 cogs instead of 1 while shifting. I am wondering whether...
Forum: Road Cycling
04-23-22, 02:34 PM
Replies: 15
Views: 529
Posted By Redbullet

I would seriously address that. Not sure that...

I would seriously address that. Not sure that hand tissues and nerves can be trained to cope with large extra pressure for a long time.

A numbers of years ago, soon after I restarted cycling, I...
Forum: Road Cycling
04-21-22, 03:33 PM
Replies: 93
Views: 4,377
Posted By Redbullet

The main advantage of tubeless over the tubed is...

The main advantage of tubeless over the tubed is sealing the punctures "on the run". The main disadvantages are difficult maintenance and rim compatibility. But if you ride 23mm (probably also 25mm)...
02-01-22, 04:17 PM
Replies: 15
Views: 993
Posted By Redbullet

I use a cheap, aluminum road bike (around 400...

I use a cheap, aluminum road bike (around 400 EUR) for the smart trainer and it works perfect. It is a 3x8 speeds (instead of 2x11 on primary carbon bike) and has "second tier brand" components -...
12-23-21, 12:50 PM
Replies: 10
Views: 738
Posted By Redbullet

Yes, sure, there is at least one cycling...

Yes, sure, there is at least one cycling application where you can upload your GPX files from your Strava rides or from other sources (with some modifications in order to smooth the rough GPS file;...
12-23-21, 12:37 PM
Replies: 33
Views: 2,446
Posted By Redbullet

I am from EU and I assumed that my very poor...

I am from EU and I assumed that my very poor experience with Zwift (lack of real draft effect and the feeling that I was sometimes riding offline, although still surrounded by a moving peloton) was...
12-20-21, 01:11 PM
Replies: 33
Views: 2,446
Posted By Redbullet

I think they use some "tricks" to face high...

I think they use some "tricks" to face high workloads on servers, and sometimes this generates unexpected behavior. I remember 3 times I wanted to get rid of a few riders who were drafting me. So,...
12-09-21, 03:35 PM
Replies: 27
Views: 816
Posted By Redbullet

I thought the topic is simpler and closer to...

I thought the topic is simpler and closer to "pure arithmetic":
Calculate N1=Nr teeth largest ring + Nr teeth large cog - nr. teeth smallest ring - nr teeth smallest cog.
Compare N1 with N2 (N2 =...
12-07-21, 02:33 PM
Replies: 33
Views: 2,446
Posted By Redbullet

An older experience: I zwifted two group rides,...

An older experience: I zwifted two group rides, around 160-200 riders. Poor drafting - most of the time I needed 20-30% more w/kg (74 kg weight) than the other riders to stay in the middle of a pack....
Forum: Road Cycling
10-26-21, 11:57 AM
Replies: 52
Views: 2,082
Posted By Redbullet

Just trying to assess the risks and prevention,...

Just trying to assess the risks and prevention, based on others' experiences, if I replace the tire well before reaching worn indicators or other visible signs. A road bike tire often holds more than...
Forum: Road Cycling
10-22-21, 01:25 PM
Replies: 52
Views: 2,082
Posted By Redbullet

So, it looks it can occur primarily due to...

So, it looks it can occur primarily due to equipment mismatch or overheating from rim brakes. It sounds somehow encouraging, since both reasons can be avoided.
But what about tubes? Can they...
Forum: Road Cycling
10-21-21, 03:26 PM
Replies: 52
Views: 2,082
Posted By Redbullet

Road tire or tube blow up – does it happen?

Never happened to me, but I am wondering…
Scenario: Ride tires (and tubes) in good shape, in mid recommended pressure interval and no tough obstacles visible on the road. But still: tire (or tube)...
Forum: Road Cycling
10-12-21, 09:46 AM
Replies: 152
Views: 9,805
Posted By Redbullet

It is true, I did not make tons of verifications...

It is true, I did not make tons of verifications before buying, I just relied on the brands on the market and their specifications and yes, I expected to work. In fact, it never happened to me to...
Forum: Road Cycling
10-11-21, 02:18 PM
Replies: 152
Views: 9,805
Posted By Redbullet

That's not fair, I'm not interested at all in...

That's not fair, I'm not interested at all in statistics.
We can also think natural: maybe a number of people are interested to better understand the tubeless topic. If I had such information...
Forum: Road Cycling
10-11-21, 02:04 PM
Replies: 152
Views: 9,805
Posted By Redbullet

No, no, you misunderstood all. Briefly: 1. Many...

No, no, you misunderstood all. Briefly:
1. Many (or most) sealants do not seal at the high pressure requested by many tubeless in the range of 23-25 mm. Don’t take my word, just search on the web...
Forum: Road Cycling
10-10-21, 01:21 PM
Replies: 152
Views: 9,805
Posted By Redbullet

It is not personal; I don’t contest your positive...

It is not personal; I don’t contest your positive experience with sealant at 100 PSI and I have nothing against tubeless. The idea is that:
1. Lots of tubeless at 23-25 mm are rated well above 70-75...
Forum: Road Cycling
10-10-21, 01:17 PM
Replies: 152
Views: 9,805
Posted By Redbullet

I don't think an alloy rim would feel much...

I don't think an alloy rim would feel much better...
Forum: Road Cycling
10-09-21, 12:43 PM
Replies: 152
Views: 9,805
Posted By Redbullet

It nearly sealed: I was able to turn back home...

It nearly sealed: I was able to turn back home ok, but with around 50% deflated tire and some thin sealant spread over the brake and frame. But next 2-3 rides were the same: around 50% deflated tire,...
Forum: Road Cycling
10-09-21, 08:12 AM
Replies: 152
Views: 9,805
Posted By Redbullet

I'm sure it did. But for a 23mm tubeless ready...

I'm sure it did. But for a 23mm tubeless ready rated as 87-130 PSI, it is different - not any sealant would seal punctures (although they do seal tire installation on the rim).

The posters...
Forum: Road Cycling
10-05-21, 02:49 PM
Replies: 152
Views: 9,805
Posted By Redbullet

Maybe I'll try... although I'm tired of repair...

Maybe I'll try... although I'm tired of repair works and questions such as: will another one work? Should I remove both tires, clean them up to avoid reaction between 2 different sealants, then seat...
Forum: Road Cycling
10-05-21, 02:43 PM
Replies: 152
Views: 9,805
Posted By Redbullet

Not at all. The above was about standards: In 5...

Not at all. The above was about standards:
In 5 years I spent around 15 EUR and 2-3 hours for repairing a number of flats on clinchers, using whatever was available at the closest LBS, and it always...
Forum: Road Cycling
10-04-21, 12:15 PM
Replies: 152
Views: 9,805
Posted By Redbullet

Thanks for advice. It is the same small...

Thanks for advice.
It is the same small puncture. The brown area is much bigger than the puncture, as I pressed the plugs to stick on tire surface inside.
I think the "game" is more complicated....
Forum: Road Cycling
10-03-21, 03:22 PM
Replies: 152
Views: 9,805
Posted By Redbullet

Yes, maybe it lasts for long. It is based on the...

Yes, maybe it lasts for long. It is based on the same principle: something thicker than the hole on the inside of the tire, which should prevent the plug to be "spit" at high pressures. It is also...
Forum: Road Cycling
10-03-21, 02:51 PM
Replies: 152
Views: 9,805
Posted By Redbullet

Thread revival: I probably found a way to fix it,...

Thread revival: I probably found a way to fix it, although the long time of the process (including seating back an old tire to the rim) doesn’t make me feel any better about the road tubeless. The...
Showing results 1 to 50 of 445
 


 
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