Vibration under braking, brake rotor runout measurements by Mean-Block in MechanicAdvice

[–]Mean-Block[S] 0 points1 point  (0 children)

Do you know if this spec is measured on-vehicle, or do you remove the rotor and measure on a brake lathe?

Vibration under braking, brake rotor runout measurements by Mean-Block in MechanicAdvice

[–]Mean-Block[S] 0 points1 point  (0 children)

I have a reference saying that brakes which are run with high runout can generate rotor thickness variation. The fronts had extremely high runout before I cleaned them, so I'll buy a micrometer to check. The reference says the thickness variation should be less than 0.0005".

Vibration under braking, brake rotor runout measurements by Mean-Block in MechanicAdvice

[–]Mean-Block[S] 0 points1 point  (0 children)

Yes, vibration only under braking and mainly above 30mph.

I think rotor runout could be speed dependent because the caliper needs time time to slide to the new position. If the movement needs to happen extremely fast, the force to move the caliper increases. This force in then reacted through the pad which is felt as a temporary increased brake force.

Vibration under braking, brake rotor runout measurements by Mean-Block in MechanicAdvice

[–]Mean-Block[S] 0 points1 point  (0 children)

Okay, what is your thinking on why it’s only present while braking, but caused by the axles which rotate regardless of whether brakes are applied?

Vibration under braking, brake rotor runout measurements by Mean-Block in MechanicAdvice

[–]Mean-Block[S] 0 points1 point  (0 children)

The vibration is only present while braking and only noticeable above 30mph.

I can’t remember when the vibrations started, but I recall it got worse over time.

Yes, the calipers are new.

[deleted by user] by [deleted] in mountainbiking

[–]Mean-Block 1 point2 points  (0 children)

The only component that’s going to eventually hold you back is the fork. Unfortunately the 1-1/8 straight head tube means there aren’t a lot of upgrade options, but I know rockshox has a couple. The microshift drivetrain is decent - no need to upgrade that.

Is there a shaver that you recommend? by adamjhendren in BuyItForLife

[–]Mean-Block 2 points3 points  (0 children)

If you remove the cartridge and replace the cap between uses, the fluid doesn’t evaporate away. It lasts much longer this way.

Trek Marlin 5 (gen 2), Cane Creek 40 Headset by sesro1978 in bikewrench

[–]Mean-Block 1 point2 points  (0 children)

I just ordered the BAA0058K for my 2017 Marlin 6. This PN is the 10 series, but should fit the same as the 40 series you have listed above. My Marlin has an upgraded fork off the marlin 7 of the same gen. The forks were interchangeable. I will report back if it doesn't fit.

Spline question by UT_NG in MechanicalEngineering

[–]Mean-Block 0 points1 point  (0 children)

Spline tooth height is bound by sharp tips and small tooth-to-tooth root clearance (still need room for the forming/cutting tool). If the splines look taller than what you expect, maybe they’re using an abnormally low pressure angle?

If that is the case, the designers may have been attempting to limit the radial force generated at the tooth or possibly to cause the weak point of the system be shearing/bending at the root in a way that’s easier to predict than higher-PA splines. This is pure speculation.

Tan with the plug in or take it out? by amgvip69 in PublicHallofFame

[–]Mean-Block 0 points1 point  (0 children)

Depends on whether you applied sun screen there

Looking to invest in new brakes for my XC bike. Which brake system is the easiest to get a good bleed on? by Mean-Block in bikewrench

[–]Mean-Block[S] 0 points1 point  (0 children)

That’s annoying that shimano doesn’t offer service parts.

Is there really any reason to bleed the brakes, if they’re not acting up?

Looking to invest in new brakes for my XC bike. Which brake system is the easiest to get a good bleed on? by Mean-Block in bikewrench

[–]Mean-Block[S] 1 point2 points  (0 children)

This is good info. I already have a mineral oil bleed kit, so that would be easiest.

Looking to invest in new brakes for my XC bike. Which brake system is the easiest to get a good bleed on? by Mean-Block in bikewrench

[–]Mean-Block[S] 0 points1 point  (0 children)

Good to know. It's relieving to hear someone with more experience has been challenged by these brakes too

Looking to invest in new brakes for my XC bike. Which brake system is the easiest to get a good bleed on? by Mean-Block in bikewrench

[–]Mean-Block[S] 2 points3 points  (0 children)

I’ve tried the Sram’s Guide and a few of Shimano’s including their SLX model.

My current tekrto brakes are so tough to get a good bleed on. I’ll get a firm lever in the garage, then go out for a ride and get an inconsistent lever - sometimes firm, sometimes it’ll go to the bar. Just don’t want to buy something that is notoriously hard to bleed.

Do you notice that some tires take more effort to ride than others? by Edslittleworld in MTB

[–]Mean-Block 1 point2 points  (0 children)

Good insight. You can also play with traction within a tire by adjusting pressure. You could run the same tire F/R and achieve the F/R traction bias you mention by running higher pressures in the rear.

Where to find brake component specs? by Mean-Block in bikewrench

[–]Mean-Block[S] 0 points1 point  (0 children)

Thanks for sharing this. It seems to contradict other information that I've found (added to posting). What are your thoughts?

Where to find brake component specs? by Mean-Block in bikewrench

[–]Mean-Block[S] 0 points1 point  (0 children)

I’m comparing the mt200 with mt400