Disc brake size
- Thread starter Jezusjonz
- Start date
Popshot
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160mm would be considered the standard size. You can get 140mm and even 120mm and 100mm though the latter are mainly escooters. Going the other way 180mm and 203mm are common. I can't say what max size will fit but discs below 160mm tend to be low performance due to the size. I'd expect 160mm will fit looking at the pictures.
maddox
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140 and 160 are very common. 180 is for serious applications, and 203 is a very rare beast. Anything below 120 is expensive toy size. But the real brake power comes from the calipers and brakepads.
You need the right balance between pad size and caliper power. To much power per surface, and you wear down the pads in a hurry, or overheat both brakes and rotors.
You need the right balance between pad size and caliper power. To much power per surface, and you wear down the pads in a hurry, or overheat both brakes and rotors.
Not sure I understand the question ?
All Brads plans start with the premise everyone uses what every parts they can find locally , they are not tied to any particular dimensions/make etc ?
So if the back looks like this then space the rear cross member far enough away the bearings to get the disk you have available to fit in the space ?
You also really need two disks , especially if you are some what beefy or fancy carrying a heavy load ?
Paul
All Brads plans start with the premise everyone uses what every parts they can find locally , they are not tied to any particular dimensions/make etc ?
So if the back looks like this then space the rear cross member far enough away the bearings to get the disk you have available to fit in the space ?
You also really need two disks , especially if you are some what beefy or fancy carrying a heavy load ?
Paul
maddox
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That variation is HUGE. From el cheapo Chinese "mini calipers" to hidiously expensive branded 4 piston downhill monsters. From mild steel 100mm disks to 203mm composite "floating and ventilated" everything including a bathroom composite disks. A few posts on this forum mention dirt cheap "Chinesium" single side calipers that do the job wonderfully.
maddox
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Emiel did try a few different "cheaper" Chinese options, and in the end, it seems they all are usable.
Even those dirt cheap (€13 for a left and right pair, delivered at home) small ones.
I fitted those on a Riksha, combined with Shimano 180mm center lock disks, and the stopping power is impressive. The driver will have to dose very carefully.
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Tillerman6
New member
Don't know about the Deltarunner, but my Timberwolf needed a 140mm disc in order to make the caliper mount possible. The 160mm size made the caliper sit too high above the frame. I would also caution everyone to guard against letting the disc get bent by any possible conditions during or after construction.
160mm discs can work on the 7" and 5.5" axle support tubes called for in the rear frame of the Deltarunner plans. What calipers you choose and their placement are YMMV territory.
When the pillow block bearings are mounted to the ends of the axle support tubes, the center of the axle will be 1.31" below the frame and 2.5" from the end of the axle support tubes because of the pillow block bearing dimensions. Pillow block bearing dimensions
If you wanted to use 180mm or 203mm discs you would need to extend the length of the axle support tubes accordingly to provide additional horizontal clearance for the larger discs.
When the pillow block bearings are mounted to the ends of the axle support tubes, the center of the axle will be 1.31" below the frame and 2.5" from the end of the axle support tubes because of the pillow block bearing dimensions. Pillow block bearing dimensions
If you wanted to use 180mm or 203mm discs you would need to extend the length of the axle support tubes accordingly to provide additional horizontal clearance for the larger discs.