Author Topic: Reaction Megabrake (Read 7716 times)

ED209 · « **on:** August 04, 2015, 12:14 PM »

Anyone know what nuts the Megabrake conversion that Rob Ridge did take? or what TPI it is?

Its not the normal 'axle' thread so maybe Skyway type?

Cheers

If you have a spare nut that you can send me thats EVEN BETTER

TwoBobRob · « **Reply #1 on:** August 04, 2015, 04:03 PM »

Ed - I don't think it was a bicycle thread at all but I do stand to be corrected.

Rob Ridge is a facebook buddy - shall I ask him for you?

john4130 · « **Reply #2 on:** August 04, 2015, 06:51 PM »

got a couple of reaction boa's here, one 10mm and the other 8mm. the 10mm uses a m10x1 nut. the original nuts are 3mm thick and there's 3 of them.

chubby · « **Reply #3 on:** August 04, 2015, 10:59 PM »

No idea what one is, megabrake sounds super cool so someone show me what it is

john4130 · « **Reply #4 on:** August 04, 2015, 11:27 PM »

it's a regular acs boa with the bearings replaced with sealed one's and a thicker axle.

chubby · « **Reply #5 on:** August 05, 2015, 12:08 AM »

Quote from: john4130 on August 04, 2015, 11:27 PM

it's a regular acs boa with the bearings replaced with sealed one's and a thicker axle.

Ahhh !!!
Thought about that when I rebuilt mine the other month, didn't know it'd been done

TwoBobRob · « **Reply #6 on:** August 05, 2015, 02:26 AM »

Not heard back from Ridger yet.

Taking John4130's info, I believe that pitch of 1mm makes it Metric Fine. A little more unusual but easily sourced from engineers supplies shops.

ED209 · « **Reply #7 on:** August 05, 2015, 08:51 AM »

cheers fellas :-)

ED209 · « **Reply #8 on:** August 05, 2015, 08:52 AM »

Quote from: john4130 on August 04, 2015, 06:51 PM

got a couple of reaction boa's here, one 10mm and the other 8mm. the 10mm uses a m10x1 nut. the original nuts are 3mm thick and there's 3 of them.

any chance of a pic of yours John :-)

john4130 · « **Reply #9 on:** August 05, 2015, 05:39 PM »

i'll post up a couple of pics tomorrow.

ED209 · « **Reply #10 on:** August 05, 2015, 06:04 PM »

Quote from: john4130 on August 05, 2015, 05:39 PM

i'll post up a couple of pics tomorrow.

Cheers

TwoBobRob · « **Reply #11 on:** August 05, 2015, 11:06 PM »

Update from the man himself;

3/8"x26tpi is the correct thing. You have a Facebook PM Ed

ED209 · « **Reply #12 on:** August 06, 2015, 03:52 PM »

Jaymz · « **Reply #13 on:** August 06, 2015, 03:59 PM »

For god sake some one post a pic of this damn thing

pickle · « **Reply #14 on:** August 06, 2015, 04:56 PM »

Quote from: Jaymz on August 06, 2015, 03:59 PM

For god sake some one post a pic of this damn thing

glad i'm not the only one thinking that

john4130 · « **Reply #15 on:** August 06, 2015, 07:27 PM »

this is my 10mm reaction boa, it's not complete as i lost a bearing and the spring, it uses four sealed bearings so when tightened, it gives almost zero flex but still very smooth. best caliper brake ever.

it does indeed have a 3/8 26 tpi axle as i just tried a wheelnut on it and it fitted.
this is my 8mm one, it still uses 10mm sealed bearings but the axle reduces from 10mm down to 8mm.

chubby · « **Reply #16 on:** August 06, 2015, 08:31 PM »

To the cave with a vernier

Christhejob · « **Reply #17 on:** August 06, 2015, 08:42 PM »

Hello. I know I wasn't dreaming...
http://www.radbmx.co.uk/forum/index.php/topic,183568.0.html

chubby · « **Reply #18 on:** August 06, 2015, 08:46 PM »

Any numbers on the bearings John

Boas measure at 18mm & Little bearings are 17 or 20mm

john4130 · « **Reply #19 on:** August 06, 2015, 09:02 PM »

there are no numbers on the bearings but i ordered a vernier caliper the other day, so when it turns up i'll get the sizes of them.

chubby · « **Reply #20 on:** August 06, 2015, 09:12 PM »

Quote from: john4130 on August 06, 2015, 09:02 PM

there are no numbers on the bearings but i ordered a vernier caliper the other day, so when it turns up i'll get the sizes of them.

Bet they're old odd skateboard wheel bearings or something daft. They look a snug fit from your pics & the boa arms don't appear to be modified

fugazi · « **Reply #21 on:** August 07, 2015, 09:08 AM »

Yes pretty sure they had skateboard wheel bearings in them

ED209 · « **Reply #22 on:** August 07, 2015, 09:11 AM »

Nah... skateboard wheel bearings are LOADS bigger ... will take a pic if I can be fooked

Thanks for the pics tho John

john4130 · « **Reply #23 on:** August 11, 2015, 07:05 PM »

just measured the bearings used in the brake. o.d is 18.97mm, i.d is 9.99mm and width is 5mm incase anyone wants to have a go at making one.

oldschoolace · « **Reply #24 on:** August 11, 2015, 07:36 PM »

Easily found at those dimensions