will 28-9 slam with 13.50 chain stay

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4/24/2013 6:44 PM

or what gear ratio will using a regular chain

recently got the stranger day tripper and im running 25-9 with the fly tractor chain

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4/24/2013 7:00 PM

Depends by what you mean by it working and how tight you want your chain

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4/24/2013 7:05 PM

Effting wrote:

Depends by what you mean by it working and how tight you want your chain

virgin tight

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4/24/2013 8:07 PM

28-9 is either 13.375 or 13.625.

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4/24/2013 8:09 PM

I have the guerra martyr and the fly chain, i have mine some what slammed if that helps you at all

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4/24/2013 8:23 PM

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4/24/2013 9:59 PM

I've used both of these.. they are very good and accurate..

27-9 is perfect for 13.5.. i ran that when i had my Deathrow frame.. 28=9 would work, but the chain will be tight as a fuck, and you'd risk ovalizing your hub shell..

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4/24/2013 10:01 PM

Jèff_Béckförd wrote:

I've used both of these.. they are very good and accurate..

27-9 is perfect for 13.5.. i ran that when i had my Deathrow frame.. 28=9 would work, but the chain will be tight as a fuck, and you'd risk ovalizing your hub shell..

I've never heard of ovalizing a hub..

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4/24/2013 10:17 PM

isnowyaznV2 wrote:

I've never heard of ovalizing a hub..

It really only happens with shitty hubs or extremely beefy chains when they are over tensioned cause premature wear.. it's because there is uneven pressure applied on top of the driver when pedaling.. first you'd go through bearings every other week.. then the driver just shits itself.. it's rare but it happens..

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4/25/2013 4:35 AM

Jèff_Béckförd wrote:

I've used both of these.. they are very good and accurate..

27-9 is perfect for 13.5.. i ran that when i had my Deathrow frame.. 28=9 would work, but the chain will be tight as a fuck, and you'd risk ovalizing your hub shell..

isnowyaznV2 wrote:

I've never heard of ovalizing a hub..

Jèff_Béckförd wrote:

It really only happens with shitty hubs or extremely beefy chains when they are over tensioned cause premature wear.. it's because there is uneven pressure applied on top of the driver when pedaling.. first you'd go through bearings every other week.. then the driver just shits itself.. it's rare but it happens..

thishappen when i used a dirt bike chain on a proper 9t hub lol now i did have some fun doing sprocket stalls to ice but the drive now wobbles

27 9 hmm tobad only gay sprockets come in that size

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4/25/2013 4:40 AM

from what im seeing here is that most frame company's are mentally the fuck retarded

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4/25/2013 12:52 PM

tomdon wrote: http://eehouse.org/fixin/formfmu.php
http://fortytwobmx.com/bmxtech_gearratio.html

there ya go bud. that should help

Jèff_Béckförd wrote:

I've used both of these.. they are very good and accurate..

27-9 is perfect for 13.5.. i ran that when i had my Deathrow frame.. 28=9 would work, but the chain will be tight as a fuck, and you'd risk ovalizing your hub shell..

isnowyaznV2 wrote:

I've never heard of ovalizing a hub..

yeah, neither have i... thats kinda weird

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4/25/2013 1:00 PM

plzdntfailmeagn wrote:

thishappen when i used a dirt bike chain on a proper 9t hub lol now i did have some fun doing sprocket stalls to ice but the drive now wobbles

27 9 hmm tobad only gay sprockets come in that size

MDS and Tree Lite?

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4/25/2013 1:03 PM

Jèff_Béckförd wrote:

It really only happens with shitty hubs or extremely beefy chains when they are over tensioned cause premature wear.. it's because there is uneven pressure applied on top of the driver when pedaling.. first you'd go through bearings every other week.. then the driver just shits itself.. it's rare but it happens..

plzdntfailmeagn wrote:

thishappen when i used a dirt bike chain on a proper 9t hub lol now i did have some fun doing sprocket stalls to ice but the drive now wobbles

27 9 hmm tobad only gay sprockets come in that size

Xxohioanxx wrote:

MDS and Tree Lite?

vinnie, animal v3 and a few others too

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4/25/2013 1:42 PM

The thing with the fucked up hub is noticeable when the chain starts leaving grooves on the hub indicating it's too tight, then the driver might begin to skip a few times, which is something a brand new driver should not do at all.. left unchecked, it becomes a huge problem..

27-9 gearing feels so amazing for street and the MDS is among the greatest sprockets ever made.

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Stupidity, outrage, vanity, cruelty, iniquity, bad faith, falsehood - we fail to see the whole array when it is facing in the same direction as we.
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4/25/2013 6:43 PM
Edited Date/Time: 4/25/2013 6:47 PM

Problem is that to know what length a certain gearing & number of links is going to be, you need to have a perfectly straight chainline (eyesight is too unreliable, only accurate way is maths), a new chain and new driver/sprocket that all fit together properly (some chains interfere)

The average BMXer won't satisfy these requirements

A worn chain, driver or sprocket will make it longer, interference and chain misalignment will make it shorter

Edit: I actually meant to post this on the "I'm a firm believer" thread, but looks like it'll be useful to this thread too. Here's a rear end length calculator link anyway, just bear in mind the above commentary

http://eehouse.org/fixin/formfmu.php?maxRing=30&minRing=25&maxCog=10&minCog=9&stayLen=13.5&wheelDiam=19.15&isMetric=0&display=table&useHalfLink=1&stretch=0.00&axleAdjust=vert&sortKey=Stay_length

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