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21
Sell and Swap / Re: aluminum fly ruben pedals
« Last post by paranoidmexican on September 03, 2019, 02:20:01 PM »
Still available?

shit man my bad, i sold these a while back
22
Bike Gallery / Re: Daily Pictures v2
« Last post by paranoidmexican on September 03, 2019, 01:35:42 PM »
 gonna try some mid school 7.5 bars, Primo Moes Bars. yes, i will finish setting up the gyro when I get a cable lol

23
The Bike Shop / Re: another new freecoaster - planetary gear engagement
« Last post by ediotism on August 29, 2019, 07:49:20 PM »
Other downside is that magnetic force falls off very quickly with distance, so in effect they're a non linear spring, in this case they'll have less force when engaged, than when the teeth are riding over each other.

the two magnets have the least distance between them when the pawls are fully engaged, im guessing that'd make the attraction strongest in that state. but to prevent skipping, the magnetic force is most needed when the tips of the pawls are just touching (they'll never fully disengage because the magnets pull them together). So the magnets will have to be pretty strong, magnetically speaking

If it were worth doing to reduce rolling resistance, shimano or some other major manufacturer would have done it.
i'd give them the benefit of doubt, i like seeing innovation nevertheless. it's fine when a thousand new ideas fails, since we just need one to hit it right and it changes the industry. This hub, for instance, has one single moving part only. best wank material for engineers all round amirite?


they claim they use "neomidium magnets that pretty much last forever", so i looked it up:

1. strongest permanent magnet commercially purchasable - "Neodymium magnets larger than a few cubic centimeters are strong enough to cause injuries to body parts pinched between two magnets, or a magnet and a ferrous metal surface, even causing broken bones" from wiki

2. very vulnerable to corrosion so it needs protective coatings - should be fine being inside a hub

3. very brittle - "Magnets that get too near each other can strike each other with enough force to chip and shatter the brittle magnets themselves". even if they're well protected from killing themselves via engagement, it's hard to imagine how they can withstand sudden shocks like an icepick or even slamming the end of the peg into the ground
24
The Lounge / Re: PAPOY V4.0
« Last post by paranoidmexican on August 28, 2019, 02:56:50 PM »
was in Dallas for a concert and had to pay respects to Dime and Vinnie. Feel free to roast me lol

25
The Bike Shop / Re: Oldest part on your BMX?
« Last post by bluebmx on August 27, 2019, 09:01:33 PM »
my cencea pivotal post is from 2007
26
The Lounge / Re: Weed is legal MAAAAAAAAN
« Last post by bluebmx on August 27, 2019, 08:56:14 PM »
I got my medical card here in Florida, good stuff!
27
The Bike Shop / Re: another new freecoaster - planetary gear engagement
« Last post by MEAT on August 27, 2019, 06:50:16 AM »
They don't like impacts, either structurally or magnetically. Other downside is that magnetic force falls off very quickly with distance, so in effect they're a non linear spring, in this case they'll have less force when engaged, than when the teeth are riding over each other. If it were worth doing to reduce rolling resistance, shimano or some other major manufacturer would have done it.
28
The Bike Shop / Re: another new freecoaster - planetary gear engagement
« Last post by ediotism on August 26, 2019, 09:43:19 AM »
https://bmxunion.com/daily/sneak-peek-inside-the-flybikes-magneto-cassette-hub/

in comparison, Fly came out with a cassette hub that uses two magnets. the entire engagement mechanism just has one moving part.

1. i wonder if this can be adopted into a freecoaster design? (currently with this magneto hub, the two magnets ATTRACT each other to pull the "pawl ring" into the teeth)

2. aren't magnets very brittle? any sort of impact to the axle/ pegs may damage it, i don't know if they've tested it enough and how much impact the hub can withstand

3. looking at their pictures, i'm guessing the 'pawl ring' can possibly be simplified to have, say 3 'pawls' instead of the entire ring being pawls but that'd probably require a higher level of machining precision to keep it working properly
29
The Bike Shop / Re: another new freecoaster - planetary gear engagement
« Last post by Bunky on August 24, 2019, 05:37:17 PM »
I've been riding one for a couple weeks.  It's basically the same internals as the Ezra hub but the clutch disc has a planetary gear in it and it engages on the hubshell instead of the axle so that when the hub moves forward the inside section of the clutch disc moves backwards pushing the pawls up.  When it moves backwards it moves the inside section forward enough to allow you to pedal forward with no resistance as long as you don't pedal forward faster than the hub is moving backwards.

It hasn't blown up on me yet, but I'm not the hardest on coasters.
30
Riding Photos / Re: Papoy riding
« Last post by Prodigal Son on August 24, 2019, 12:20:55 AM »
Stoked to get out even once a week now.
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