Mechanics Quick Question Thread [Ask Questions Here]

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Mechanics Quick Question Thread [Ask Questions Here]
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Posted: May 12, 2021 at 10:25 Quote
freestyIAM wrote:
bishopsmike wrote:
seraph wrote:


I disagree here. Burning impurities off of your rotor works for me consistently. I do it for customers' bikes and my own.

Same here. 3 mins on the bbq is better than replacing the pads for me.

I agree with everything gab says except fire. I have had good luck with spraying pads and rotors with IPA and lighting them up until the IPA is burnt off. Sometimes though the contamination is too deep and it doesn't help. Best advice IMO is to keep contaminants away from your brakes which means ditching aerosol based anything for your bike like gab says.

I see it as a win/win. Even if burning your rotors doesn't work, you still get to light something on fire.

Posted: May 12, 2021 at 16:50 Quote
So I just realized the end piece of the rear hub axle is but in half. I have a race this weekend so I was wondered if I could ride with it broken. The annoying thing is that I had that issue 4 months ago and bought a new one. I was thinking that the though axle would hold everything in place but correct me if I'm wrong.

Posted: May 12, 2021 at 17:32 Quote
p-m-z,

Sounds like you're referring to the end cap. No, it is absolutely not safe to ride with a broken end cap. The end cap is clearly taking enough load to break the end cap, and those loads are going to do much worse things without an intact end cap.

Here's something few people realize:

Most "through-axles" are not axles.

Most are just skewers, same as in the old "quick-release" days. If it's not rigidly clamped by the fork leg (ex. pinch bolts on both sides of the fork leg), then all it's doing is pressing the hub against the faces of the fork or frame, just like an old QR. The real axle is within the hub, and the real axle is connected to the frame or fork via the end caps. You need the end caps.

Watch this for a more thorough explanation:


Posted: May 12, 2021 at 18:06 Quote
Dang, thanks for letting me know. I'll see if I can get one before the race.

What do you think would happen if I did ride with it though?Moon

Also, do you know why this keeps happening, I've had to buy 3 of these in the last year or so?

Posted: May 12, 2021 at 18:17 Quote
Difficult to say what could happen. Most likely is probably a broken through-"axle", with possible damage to the hub or frame/fork. I broke a through-axle last year (different reason, frame alignment), which caused a crash. About one second prior to the crash, I was doing over 50 km/h; a crash at that speed probably would've been bad. Don't set yourself up for that.

It's also difficult to say why it's happening. Possibilities include:

• Insufficient tightness of the through-"axle".
• Frame alignment.
• Broken hub axle.
• Misalignment in the hub, such as an incorrectly installed bearing.
• Poor product design.

There's something seriously wrong if you've gone through three in a year.

Posted: May 12, 2021 at 18:27 Quote
R-M-R wrote:
Difficult to say what could happen. Most likely is probably a broken through-"axle", with possible damage to the hub or frame/fork. I broke a through-axle last year (different reason, frame alignment), which caused a crash. About one second prior to the crash, I was doing over 50 km/h; a crash at that speed probably would've been bad. Don't set yourself up for that.

It's also difficult to say why it's happening. Possibilities include:

• Insufficient tightness of the through-"axle".
• Frame alignment.
• Broken hub axle.
• Misalignment in the hub, such as an incorrectly installed bearing.
• Poor product design.

There's something seriously wrong if you've gone through three in a year.


Ok thanks for the advice, I was thinking about getting a new wheelset anyways cause mine is really old and clapped.

Posted: May 12, 2021 at 18:39 Quote
That sounds like a good idea.

Posted: May 12, 2021 at 20:20 Quote
Can I put an XT SM-CRM85 Direct-Mount Chainring on my new SLX crankarms on my 2021 stumpy evo comp? Looking to put a 28t on and slx doesn't have 28, only xt. Just curious if the direct mount xt is compatible on slx. Reading conflicting reports.

Posted: May 12, 2021 at 22:58 Quote
Pads and disks are so cheap from Uberbike that I just replace the lot if contaminated, never managed to get brakes back to 100% with any cleaning process, can get them better but never like new.

Posted: May 13, 2021 at 1:46 Quote
Madhavok wrote:
Can I put an XT SM-CRM85 Direct-Mount Chainring on my new SLX crankarms on my 2021 stumpy evo comp? Looking to put a 28t on and slx doesn't have 28, only xt. Just curious if the direct mount xt is compatible on slx. Reading conflicting reports.

Yes, the mounting interface is the same for both.

Posted: May 13, 2021 at 3:31 Quote
Hi,
I'm in need of new bearings for my dtswiss 240s hubs. Found pdf with details, but it's outdated and wrong.
What and how many bearings do I need for front 110×15 hub and rear 148×12 hub + xd freehub?
Thx

Posted: May 13, 2021 at 9:10 Quote
riish wrote:
Madhavok wrote:
Can I put an XT SM-CRM85 Direct-Mount Chainring on my new SLX crankarms on my 2021 stumpy evo comp? Looking to put a 28t on and slx doesn't have 28, only xt. Just curious if the direct mount xt is compatible on slx. Reading conflicting reports.

Yes, the mounting interface is the same for both.

Thank you for the clarification.

Posted: May 13, 2021 at 10:38 Quote
OK, new question.
I need to replace the brake hose on my xtr brakes. Brake calipers are br-m965's (old), and use a brake hose that is SM-BH96.Banjo at caliper, straight at lever.
Can I use a newer Saint banjo brake hose (bh90, I believe)?
My question is...are Shimano Banjos the same across the line?
Thanks in Advance

Posted: May 13, 2021 at 12:27 Quote
raidenCZE wrote:
Hi,
I'm in need of new bearings for my dtswiss 240s hubs. Found pdf with details, but it's outdated and wrong.
What and how many bearings do I need for front 110×15 hub and rear 148×12 hub + xd freehub?
Thx

The simplest and often the cheapest, it to take the old out and go to a bearing specialist. I do this for all the bearing I replace on bikes. It is usually half the price and is often the same product, or you get Timken or stainless for the same price.

Posted: May 13, 2021 at 12:58 Quote
woofer2609 wrote:
OK, new question.
I need to replace the brake hose on my xtr brakes. Brake calipers are br-m965's (old), and use a brake hose that is SM-BH96.Banjo at caliper, straight at lever.
Can I use a newer Saint banjo brake hose (bh90, I believe)?
My question is...are Shimano Banjos the same across the line?
Thanks in Advance
I spoke with Bill from Shimano. So great to actually talk to a person!
He said that the banjos are the same across the Shimano line, and will be fine, but the banjo bolts change, so I should use a SM-BH90 with any banjo, but must use the same bolt.


 
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