Shimano disc lacing recommendation.
11-16-20, 09:41 AM
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Shimano disc lacing recommendation.
I discovered the Shimano recommended way of lacing disc wheels after I built the rear (the front is correct) and have realized that the rotor side is wrong. The "Shimano" way has the outer spokes laced to be tensioned (pulled) under braking. I laced it as a symmetrical wheel. Should I take this apart and re-lace it, or will this be OK? This is a commuter and sometimes gravel bike, not a downhill MTB bomber.
11-16-20, 09:49 AM
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Shimano recommends asymmetrical lacing? So that under heavy braking, the rim moves axially, towards the disc, relative to the hub? There must be a good reason, but I would like to know what it is. Either way, I can't image that it would make a big difference, so I would leave the wheeel as it is.
11-16-20, 01:02 PM
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When the outer spokes are under tension while braking they get pulled tighter. If they were loosened, they may bend slightly outward interfering with the disc brake caliper. A friend did exactly as you did and when he heavily brakes, his spokes hit the disc brake caliper and you can hear a tick tick tick as the spokes hit. If yours don't and you have enough clearance, then you shouldn't have a problem.
11-16-20, 03:55 PM
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I discovered a discussion about "Shimano" asymmetrical lacing on another forum and the consensus seemed to be, if the wheels are built well, it doesn't really matter.
I will check the caliper to spoke distance though.
I will check the caliper to spoke distance though.
11-16-20, 03:58 PM
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11-16-20, 04:39 PM
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I don't know about disk hub lacing directions (other then what I've read, making me an expert
) but if the imaged hub is a rear then some will say the drive side spokes are laced in the wrong direction. Andy (who rides a tandem and does know about this)
) but if the imaged hub is a rear then some will say the drive side spokes are laced in the wrong direction. Andy (who rides a tandem and does know about this)
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11-16-20, 06:23 PM
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11-16-20, 08:28 PM
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Here's what another wheel builder told me today:
"I would not rebuild the wheel because it's highly unlikely that the rider would ever feel any difference in performance. (Although if the rider complained about it and had paid me for the wheel and it was my mistake, I probably would relace it.) As you noticed there are all kinds of spoke lacing patterns on wheels out in the field and the most important things are that they are true, round and properly tensioned, not the lacing pattern. Doing it the Shimano way has become an industry standard for many pro wheel builders since Shimano is a components leader that does their homework. So it optimizes the lacing to support disc wheels. But, plenty of disc wheels laced other ways are out there and doing fine ;-) I hope this helps!"
I think I'm done worrying about it.
"I would not rebuild the wheel because it's highly unlikely that the rider would ever feel any difference in performance. (Although if the rider complained about it and had paid me for the wheel and it was my mistake, I probably would relace it.) As you noticed there are all kinds of spoke lacing patterns on wheels out in the field and the most important things are that they are true, round and properly tensioned, not the lacing pattern. Doing it the Shimano way has become an industry standard for many pro wheel builders since Shimano is a components leader that does their homework. So it optimizes the lacing to support disc wheels. But, plenty of disc wheels laced other ways are out there and doing fine ;-) I hope this helps!"
I think I'm done worrying about it.
