Just How Critical is Brake Rotor Direction?
01-28-23, 02:28 PM
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Originally Posted by wolfchild
The first rotor needs to be installed with the arrow inside ( facing towards the fork leg ) in order for the spokes to have proper orientation. The manufacturer should really be printing that arrow on the other side of the rotor.
01-28-23, 02:37 PM
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Originally Posted by sjanzeir
If I put the rotor on with the arrow on the inside (which I did - see earlier post) then the arrow would be pointing in reverse!
01-28-23, 02:39 PM
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Originally Posted by sjanzeir
Dude, the fork leg goes on the outside! Read my OP (and subsequent posts - by me and everyone else) again!
01-28-23, 03:32 PM
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Originally Posted by wolfchild
The first rotor needs to be installed with the arrow inside ( facing towards the fork leg ) in order for the spokes to have proper orientation. The manufacturer should really be printing that arrow on the other side of the rotor.
01-28-23, 03:36 PM
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Originally Posted by wolfchild
I think you should contact the manufacturer and find out for sure...I've only used Avid and Shimano so I am not familiar with any other brands
01-28-23, 04:08 PM
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Originally Posted by PeteHski
Avid, Shimano, SRAM, Campag rotors all have the arrow facing the same way. Maybe they are all wrong and the brand I've never heard of has it right, lol
https://www.google.com/search?q=the+...&client=safari
01-28-23, 04:20 PM
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Originally Posted by PeteHski
Avid, Shimano, SRAM, Campag rotors all have the arrow facing the same way. Maybe they are all wrong and the brand I've never heard of has it right, lol
01-28-23, 04:22 PM
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Park Tool website has a page on disc brake rotors installation, OP should check it out.
01-28-23, 04:34 PM
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Here’s a wild thought. How about contacting the manufacturer since their primary concern is liability?
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01-28-23, 04:55 PM
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FWIW, Shimano Ice Tech rotor below:
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01-28-23, 06:08 PM
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Originally Posted by wolfchild
I know you said it tongue in cheek...but I highly doubt that all the well known brands had it wrong all these years. If anything it's probably the lesser known brands that have made a mistake, or maybe they are just designed to be installed differently, I don't know, I've never even heard of this particular brand of bike rotors until OP posted it.
01-28-23, 06:19 PM
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Originally Posted by wolfchild
I've never even heard of this particular brand of bike rotors until OP posted it.
01-28-23, 07:09 PM
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Originally Posted by Trakhak
A minority have the opposite orientation.
01-28-23, 07:23 PM
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Originally Posted by sjanzeir
Could you direct me in the way of at least some of these? Thanks!
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01-28-23, 07:25 PM
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I was bored so I did a bit of digging and found that discs are mounted with spiral spokes leading so that the thermal tensile stress from expansion of the outer part of the disc relative to the hub is balanced out by the compressive stress on the spokes. Makes sense, but probably not a critical safety issue.
01-28-23, 07:29 PM
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Originally Posted by Lombard
Off topic, but I love your avatar!
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01-29-23, 01:37 AM
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Originally Posted by Trakhak
For those who think the rotational direction of the rotor arms represents anything other than a marketing decision, perhaps you'd be interested in acquiring these cranks:
(but you'll always lose to the Americans)
01-29-23, 07:40 AM
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Originally Posted by sjanzeir
Why, thank you! I didn't think anyone would notice!
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