Posts: 281
Joined: 10/21/2014
Location: Woodbridge, VA USA
Hi guys,
just got a quick question about frame geometry, I'm toying around with the idea of a custom frame but I'm always terrible at figuring out rear end length, i run 28t-9t gearing, but don't know if i can slam a 13" rear (25-9 probably can but i don't like that ).
do I need to go a little shorter than 13 to be able to slam 28-9 ?
Thanks
My FBM bike check
Posts: 1260
Joined: 5/5/2012
Location: AUS
Should be able to if you use a single half link
I'm a punk bmxer, I can't do it well so I do it loud.
Posts: 5719
Joined: 2/29/2012
Location: NY, USA
Posts: 2420
Joined: 6/18/2013
Location: Wellsburg, WV USA
Posts: 2506
Joined: 11/14/2013
Location: Akron, OH USA
what frame ?
Testimony and apologies
I want everyone to know that Jesus Christ died on the cross for all of your sins, he went to hell for three days and defeated death and rose from the grave on the 3rd day.
instagram
What would Jesus say: I didn't die for you to live like this!
old edit
Posts: 281
Joined: 10/21/2014
Location: Woodbridge, VA USA
Posts: 281
Joined: 10/21/2014
Location: Woodbridge, VA USA
OneGuyIlluminatiEye wrote:what frame ?
It's probably going to be an FBM or Laird custom, I'm trying to figure out the CS length so i can slam 28/9, because all the frames in the market are design for 25/9.
I like 13" cs but i guess i have to go 13.05cs for 28/9.
My FBM bike check
Posts: 5719
Joined: 2/29/2012
Location: NY, USA
Edited Date/Time:
For future reference, I always use one of these. They're damn close to perfect. As accurate as I've ever seen
http://eehouse.org/fixin/formfmu.php
http://www.fortytwobmx.com/bmxtech_gearratio.html
I'm on the vital legit list!
Posts: 281
Joined: 10/21/2014
Location: Woodbridge, VA USA
Posts: 860
Joined: 9/16/2013
Location: Chandler, AZ USA
Bwahahaha.
Then shall the dust return to the earth as it was: and the spirit shall return unto God who gave it. (Ecclesiastes 12:7 KJV)
Sold to: storeboughtchild,Maximusbikes,cro tec,Showtime402,Kevinbrock338,dktechethan,Robinson79
Traded: livefreeordie2332(x2), Aebasher.
TXT Me (480)340-7551
Posts: 1524
Joined: 3/12/2011
Location: Oak Lawn, IL USA
Fits website gives CS length with different set ups too.
9T
28/9: 13.125 W/ Half Link
27/9: 13.25 W/ Half Link
27/9: 13.00 W/Out Half Link
25/9: 13.00 W/ Half Link
25/9: 13.25 W/Out Half Link
8T
23/8: 13.125 W/Out Half Link
25/8: 13.125 W/ Half Link
26/8: 13.00 W/ Half Link
26/8: 13.25 W/Out Half Link
Legit
Oscar5788,Scramhype,SuperstarDK,Howlerfbm,AlexDanielP,KilledGlamour,notorious NIG,KYMIKE
Posts: 2506
Joined: 11/14/2013
Location: Akron, OH USA
looks like 27/9 is what your gonna want to roll on, ive used this gear ratio for awhile now feels alot better than 28/9 and not too easy like 25/9
Testimony and apologies
I want everyone to know that Jesus Christ died on the cross for all of your sins, he went to hell for three days and defeated death and rose from the grave on the 3rd day.
instagram
What would Jesus say: I didn't die for you to live like this!
old edit
Posts: 5719
Joined: 2/29/2012
Location: NY, USA
Hatebreeder wrote:Fits website gives CS length with different set ups too.
9T
28/9: 13.125 W/ Half Link
27/9: 13.25 W/ Half Link
27/9: 13.00 ...more
Those are all rounded numbers
I'm on the vital legit list!
Posts: 281
Joined: 10/21/2014
Location: Woodbridge, VA USA
Posts: 1347
Joined: 7/13/2014
Location: FRA
Edited Date/Time:
I ride a fiend embryo, this frame got a 13,75 slammed but i can't slam it with my 28x9, i had try with a 25t sprocket and it works.
But fuck that, wheel slamming is a completely dumb concept, if you really want to ride a 13" chainstays, take a frame with a 12.5 or 12. something to get your wheel to 13" without slamming it.
Posts: 2506
Joined: 11/14/2013
Location: Akron, OH USA
Testimony and apologies
I want everyone to know that Jesus Christ died on the cross for all of your sins, he went to hell for three days and defeated death and rose from the grave on the 3rd day.
instagram
What would Jesus say: I didn't die for you to live like this!
old edit
Posts: 281
Joined: 10/21/2014
Location: Woodbridge, VA USA
