The clamps in that case were obviously loose. The mounts weren’t bent, the clamp was simply loose on the hanger.
What @moon is describing is that when you add a press fit adapter to the end of a hanger, that’s what your motor plates attach to. So a 200mm hanger then gets a pressfit Mount which we will assume sits flush, then 6mm of motor plate, clearance for a pulley (25mm) then the wheel, 25mm. So you effectively have a 262mm hanger between the wheels. Things get wide really fast and now you’ve got 50+ mm of axle on either side.
Clamp style mounts are far better and more flexible.
I will say, if you are designing a custom truck I’d consider the following:
pivot tip clearance around the cup, there’s less room to beef up a caliber 2 profile around the pivot post on the hanger than it appears. On the bench it clears, test it with low duro pivot cup bushings and weight on the board to make sure there’s no interaction with the baseplate around the pivot cup. Weight makes a big difference.
consider the motor mount clamps in the hanger geometry. What shapes and surfaces will allow things to mount squarely the easiest. Make sure that the hanger clamp can slide from a motor to motor distance of 115mm for dual 6355s out to whatever. Clearing 6368s or 6374s will widen the market a bit. Also dual 5065s.
if you’re considering a gear drive figure it out now. You can integrate bearing surfaces into the hanger or the axles which could be incorporated into other areas.
take into consideration 10mm axles. What bearings are readily available for 8 and 10mm axles etc.
Being able to set up a 184 ish sized hanger and keep that 184 wheel width is important to users of smaller setups while having some flexibility to widen the effective width to around 215 captures a lot of the market.
I hate the process of adjusting clamps on trucks to be the exact distance for the belt to line up. I also hate using red thread locker, fastening the bolts as hard as I can, and then the thing still getting loose after time. If I was designing a truck for esk8, I would either make it compatible with press fit clamps that don’t have that problem, or just have the clamp part of the hanger, like Evolve trucks do.
Mr. @moon, I take back what I said about not fully agreeing. I wanted to make press-fits for my BN220 hangers but realized that my wheels needed to be spaced out away from the hanger more which means I needed longer axles. The axles on my BN220’s are fixed and short. That’s why the press fits you made works on SR RKP’s because the hanger is narrower and the axle quite a bit longer…
@Boardnamics Haha, easy there buddy. Don’t get all defensive. I’m not knocking your product, I’m talking about axle length in the context of implementing a press-fit mounting solution.
Let me rephrase and say your axles are “relatively short when compared to Surf-Rodz axles but SR RKP hangers are also narrower than your hanger”. If you look at my picture, you’ll see there is no room for a pressfit mount. Wheels need to be further out to create space between pulley and end of hanger, which means there needs to be more axle exposed (longer axle or combination of narrower hanger and longer axle).
What @b264 said. Kevin’s not being defensive, they’re just not short. If you need winder than you need a wider hanger.
Axle length is not an infinite number to play with either. @boardnamics have 50mm of useable axle, meaning your 200 mm hanger can still mount wheels as an effective 250mm of hanger (room for 25mm per side). There is a limit though. 8mm axles will bend if long enough and the further you move the wheel from the hanger the more lever load you apply to the axle. I’d say his axles are the max I’d suggest.
Surfrodz can go longer because they’re 10mm shoulder bolts. But even still, they have maximums as well.
Lol, I said relatively short! Let me clarify, yes Boardnamics axles in general are long, but they are a little bit shorter than SR axles. That’s all I was trying to get across, no more no less.
He wasn’t. Kinda like texting, people’s actual reactions don’t translate well….
Well I haven’t used SurfRodz trucks, but the Boardnamics axles are by far the longest I’ve used. Describing them as “short” or “relatively short” is certainly not accurate. In the entire skateboard world, and even the entire electric skateboard world, they are probably in the top 1% as far as axle length is concerned.
Push fit make a huge difference because you have to spacer the inner bearing of the pulley out from the hanger far enough so that the inside of the pulley clears the motor plate. They do require a ton of axle length because of that.
I’ve got both, them and SR. Both with many lengths of shoulder bolts and have the fixed axles in a bag.
The SR are just different trucks. The 10mm diameter makes using spacers more reasonable, but there’s still limits. The caliber style hangers are offered in widths up to 280mm now so the approach should be to those rather than longer axles. That’s why press fit mounts have been mostly abandoned.
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