A lot of people are asking us how the original 456 geometry works with different lengths of forks. Designed to take 4, 5 or 6 inch travel forks (100mm - 160mm in new money) it's one of the most versatile hard-tails known to man.
Q: Why is the geometry 456?
A: As fork suspension got longer for Cross Country and even longer for trail riding frame geometry needed to change. The Inbred was designed to fit 0-100mm (0-4inches) of suspension so On-One developed the 456 to fit 4, 5 or 6inches of travel.
Q: So what happens to the geometry with different fork lengths? Here's the nitty gritty:
A: With a 100mm fork the geometry is in XC attack mode with a steep 74 degree seat angle, 70.5deg head angle and a low bottom bracket, at 12.4in, when you are sat on the bike.
If you like your bike handling fast then this is the set-up for you... .

With a 130mm fork the geometry is in the "optimum" position with a 69deg deg head angle, 72.5deg degree seat angle and 12.7 inch high bottom bracket when you're on the bike.
This is the "all-rounder" set up both excellent at climbing and decending.

A 160mm fork slackens the geometry to a slack 67.7 head angle, 71.2degree seat angle and 13.2 inch high bottom bracket.

The geometry is the same for the current 456 and the new Carbon 456 so this info is equally relevant to each bike. Get a bike and get riding!
Comments
DagF
22 March 2012
Do any of your frames have ISCG 05 tabs? The 456 EVO, maybe?
BrantR (On-One Team)
8 February 2012
I've just updated this page with correct dimensions for this frame, based on 30% sag.
Izzy
8 February 2012
Going by those numbers, would it be accurate to say that the BB height would be around 11.5in with a 100mm travel fork?
mike
26 January 2012
I would also like to know what the geomerty with the 650 and rigid 29er fork and the 650 loop fork.
Dimitris
22 January 2012
Would you recommend using a 650b wheelset on this frame?
Graham
3 January 2012
I am looking to sort one of these frames for myself, however at 5' 4" tall, strictly speaking I fall below the size you recommend for me (looking at a 456 carbon which only comes in 16" or larger) I would be running it with a set of Rockshox Revelation RL (150mm but can use spacers to reduce the travel to 140 or 130mm). Bearing in mind I currently run a 17" GT Backwoods (there's a blast from the past) with the same forks spaced down to 130mm and whilst riding is great, the standover height is a little on the tall side. I have no idea on the geometry of the frame so was looking for a bit of advice as to would a 16" 456 be too big for me. I wouldn't be too worried about leaving the spacers in for 130mm travel to reduce the standover but just after a bit of advice. It would be a shame if it was too big as the frame looks the dogs and I've heard nothing but good things about it!!
Izzy
6 December 2011
The geo numbers don't look right. The table in the frame page says 67.5/71 with a static 120mm fork. Then above you say 68/74 with a static 100mm. Only a half degree diff on the head angle but 3 degrees on the SA between 100mm and 120mm travel?
Dave Walsh
10 November 2011
Hi, how does the head angle compare with a standard Inbred when both are fitted with a 100mm fork? I currently have an Inbred (mk 1) and would like something a bit slacker with an option of fitting a longer fork in future.
JonB (On-One Team)
30 September 2011
No- early November
gee
30 September 2011
yeah that sounds like a much better option and is there a specific date?
JonB (On-One Team)
30 September 2011
Should be around the same, though we are planning to offer double plus bash on these.
gee
30 September 2011
ok and what are the full build 456 slx trail going to cost?
JonB (On-One Team)
30 September 2011
Hi Gee. 456 steel frames will be back in stock early November.
gee
29 September 2011
when will the 456 trail slx be in stock again? and when is the 2012 range avilable if there is one
JonB (On-One Team)
1 September 2011
I wouldn't personally use it
odbod
31 August 2011
hmmm I'd be using it for winter singlespeeding and our club rides do tend to end in some urban riding and a few steps here and there, no worse than a good trail centre blast and some of the more serious XC races in terms of punishment, certainly 24:12 this year had some pretty big rocky decents this year and I would have thought it would be OK using it as a 29er. Would you be concerned about using it on a 456 frame then?
JonB (On-One Team)
31 August 2011
Not really. Theyre a super light race 29er fork and by running them 69er you may put undue stresses on them- not really recommended.
odbod
31 August 2011
Would it work in 69er mode on 29er race forks? I guess it would push the frame up to the "5" or so geometry, or would there be pedal/toe clearance issues or completely mess the whole thing up...
JonB (On-One Team)
31 August 2011
Well, it would be racey. But it would work- it's the "4" out of "456" after all...
odbod
30 August 2011
how would the geometry stack up with the 29er race fork, it would look excellent with my 456 carbon in red and black, assuming it's the same red!? Would it be a bit too short at 450mm rather than the 470 you guys have suggested?
JonB (On-One Team)
22 August 2011
Maybe 456 and 470 a-to-c rigid carbon 29er fork- http://www.on-one.co.uk/i/q/FOOOCAR/on-one-carbon-fork
valentino pescini
20 August 2011
hi, thanks for your reply; really i prefer the 456 frame (colors, shape): i'll use the bike as hybrid (steel fork, light setup) for 90%; like AM only as a backup of my full if i need. Do you think i have to go to the inbred the same?
DoH (On-One Team)
17 August 2011
Hi Valentino. If you're thinking about going from rigid to 120mm travel forks I'd suggest you went for an Inbred rather than a 456- they are better when you need shorter forks- 456 is best around 140mm.
valentino pescini
17 August 2011
hi, i'd like to build a hybrid bike based on 456 frame+rigid fork(http://www.on-one.co.uk/i/q/FOOOCR26DO/on-one-cromo-26er-mtb-fork-disc-only). My goal is to have a bike like Cannondale FatBoy; but at the same way i can move that bike in an AM-bike putting a 120mm travel fork and an appropriate wheelset. My question is if my idea is ok with the frame&fork above listed. regards, vp
DoH (On-One Team)
15 August 2011
Hi Pascal. For the angles you're looking for with the fork you mention we'd strongly suggest you went for a Whippet rather than a Carbon 456.
Pascal
12 August 2011
Would like to build a light rigid mountain bike ,a 456 carbon frame with a 445mm rigid carbon fork is it OK ? If I refer to the geometry you give for the 456 with a 120mm travel full extended travel fork 67.5 for the head and 71 for the seat ( are the numbers correct? ) it does about 70 deg for the head and 73 for the seat with a 445 MM rigid fork, right ?
JonB (On-One Team)
6 August 2011
Tim, in our humble opinion the summer season is going to start feeling a bit odd with a rigid fork, and really needs a 450mm one to keep it handling OK. Better with suspension.
Tim
6 August 2011
Sounds great. As I am currently looking at either a 456 or 456 Summer, how would the 29er carbon fork go on 456 Summer? Would it also work well on a 456 Summer?
DoH (On-One Team)
5 August 2011
Hi Tim. Good idea speccing the 470 a-to-c carbon forks. The figures would be 69.3deg h/a and 72.8deg seat angle with 26in front wheel and 67.5deg front and 71deg back with a 29in front wheel…
Tim
5 August 2011
What would the HA and SA be with the carbon 29er fork?
JonB (On-One Team)
29 July 2011
Yep, 29er fork (470 a-to-c) is great on a 456.
Kenneth
28 July 2011
Wouldn't be a good geometry with the 29' carbon fork applied on the 456 with 26" wheels?
ThomasH (On-One Team)
26 May 2011
Hi Mike, which fork did you go for? Our Cro-mo rigid fork? It'll still work with that but you'd be better off with a longer travel suspension fork to truly get the most out of the 456.
Mike
23 May 2011
I just took possession of a 456 summer season with the starter kit. The fork you ship isn't suspension adjusted, so is it actually usable with the frame geometry? It really looks like the front end will be way too low, and the seat tube angle is getting very steep. I'm interested in your comments. Thanks mike
ThomasH (On-One Team)
4 May 2011
Simon, unfortunately not. It's completely personal preference really.
simon
3 May 2011
Is there a simular recommended stem length article ?
ThomasH (On-One Team)
21 March 2011
Hi Tez, if you're wanting to keep the handling nice and nippy for singletrack and switchbacks, I'd go for the 18", if you're more likely to do long steady rides with lots of long climbs the 20" may be better.
Tez
16 March 2011
Im a bit of an inbetween size at 6'1" and would use it mainly for XC but will have a play on the rough stuff too with the option there with the 120mm forks. Thinking of 18" for the standover and using my 90mm stem (even though recommended is 80mm) but will it still be on the small side.
Tez
15 March 2011
Yes, have tora 318 uturn.
ThomasH (On-One Team)
15 March 2011
Hi Tez, that's the idea yeah. You'll need a fork with adjustable travel though such as RockShox's U-turn system.
Tez
14 March 2011
So with adjustable travel, I can use one of these for XC and the rough stuff with a couple of twists of the uturn?
GarrettO
17 January 2011
this is why I love having an adjustable travel fork (115-160mm). I can have any of these setups all in one bike! :D
JonB (On One Team)
26 December 2010
My mistake, Gareth. I made some corrections to the geometry the other day and appear to have got head and seat angles mixed up in the 130mm section. I'll fix it right now. Merry Christmas!
Gareth Topp
25 December 2010
The head angle figures don't seem to add up, the head angle gets steeper when you go from 100mm forks to 130 mm forks and then slacker for the 160mm forks...the trend should be becoming slacker with longer travel shouldn't it?
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