How To Change Disc Rotor Size 160mm To 140mm

In this video, I go through step by step how to change disc rotor size and the problems you may encounter
here I change my 160mm to a 140mm rotor.

[@akunyer]

Thank you very much, this video was very helpful. We never thought we could do something like that.

[@KyrosHouseCycling]

No worries! 👍

[@bikingchupei2447]

3:23 eyeballing it and gradually tightening the caliper is the best method.

[@cyberx7098]

Great video. What is the name of the Disc Rotor measuring tool you are using in the video and where can I buy it? Thanks

[@Alejandrokimbmx]

Great video! Thanks a lot 🙌🏼🙌🏼

[@zellmersebastian4618]

How you do it on the rear?

[@KyrosHouseCycling]

I don’t think you can, never found a way. 👍

[@windscreen91]

Most likely, the reason your calipers wouldn't center up on the rotor is because the frame needs to be refaced. It is a super common issue, and even high end bikes seem to suffer from it.

[@ianmangham4570]

Cool 🤘🤠🇬🇧 looks light

[@KyrosHouseCycling]

It’s around 8.5kg 👍

[@tristanwche]

I am trying to change Giant Propel's front from 160mm to 140mm.. it seems I cannot use the mounting braket just upside down.. Did you use a mounting braket from TekPro?.. and How about the length of the brake line? easy to pull it down?? or I have to change the line??

[@KyrosHouseCycling]

No the bracket came with the calliper, I built the bike myself so left a little slack in the forks, the cable in your bike might be too short to change the size. If so you’ll need to change the cable. 👍

[@dha588]

Why do people change from 160 to 140?

[@IkaikaKahoano]

So did you have to install a longer brake cable or were you able to get out the rotor rub?

[@KyrosHouseCycling]

No I just had enough cable in the frame to change from 160 to 140. 👍

[@Outdoor_Nam10]

How about the rear brakes? Is the stock brake mount can fit to 140mm rotor ?

[@KyrosHouseCycling]

Yeah 140 on the back, can’t see a way to make it 160. 👍

[@ayowser01]

Why would you ever switch to a 140mm front? I could see a reason for going 140 in the rear, but not the front.

[@KyrosHouseCycling]

I found 160mm to much break, and I didn’t like the size. sounds silly but I’m only riding at 30 kph max. 👍

[@stephen_101]

It can really help with braking stability if the front brake is too powerful, to the point of being dangerous. I've seen cyclocross bikes being fitted with 140mm front, 160mm or 180mm rear just to keep things more stable. It works well as long as you spend a little time re-learning your braking technique.

[@KyrosHouseCycling]

@@stephen_101 well I haven’t had any problems yet, I’m only a 30kph average when I ride so nothing fast. 👍

[@chacmool2581]

Why did you decide to downsize the front rotor?

[@KyrosHouseCycling]

Purely as I didn’t like the 160 really, and 140 provides enough brake for me. I suppose for safety I should have a 160… who knows. 👍

[@ozgurinsan]

How is the breaking performance with the 140mm rotor on front ?

[@KyrosHouseCycling]

At the speed I go I don’t notice, it’s probably just I’ve gotten used to it, in theory there’s less stopping power and I’ve seen tests done but I can’t say I notice. 👍

[@joshsilvestre2093]

What's the size of the brake pads, on ur 140mm?

[@KyrosHouseCycling]

I'm not sure they are just a standard size pad that fits the Ultegra Caliper

[@varejka6041]

WHAT ABOUT REAR

[@KyrosHouseCycling]

Don’t think you can. 👍

[@tim4168]

to be fair you left enough slack for the 160mm ;)

[@KyrosHouseCycling]

I did! Great thinking eh!? 👍

[@Max__apex]

The most pointless thing to do

[@KyrosHouseCycling]

Actually it meant I sold my 160 so it had its merits. 👍

[@jimlewandowski7648]

On only my third ride on disc brakes in a paceline something unexpected occurred when a car pinched the marked shoulder. I locked up the rear and almost slid out. Converting the rear to 140mm seems to be the only available solution.

[@dmitry.gashko]

@@jimlewandowski7648 or you can just learn how to brake properly. And sliding of the rear is not that dangerous in most cases. Just try to do this intentionally sometimes when no traffic around.