KR1 frame vs KR1-S

Wheels, shocks, forks, frame
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KwakOn
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Location: Northern Ireland

KR1 frame vs KR1-S

Post by KwakOn »

Hi, just wondering:

Do the KR1 and KR1-S have same frame(geometry)? I realise they are constructed slightly different i.e. spars are flat on KR1-S.

Looking at the figures in the two manuals:
_________________KR1------KR1-S_______

Wheelbase(mm).........1,365 = 1,365

Ride Height(mm)...........125 > 120
Seat Height(mm)...........750 < 755

Weight(Kg): Front...........70 < 77
..................Rear..............76 < 77


Frame:
Caster(rake angle).........24 = 24
.............Trail(mm)............93 > 90

Front: Tyre("17).......100/70 ~ 110/70
Susp Travel(mm)...........130 > 120

Rear: Tyre("18 ).......130/60 ~ 140/60
...Susp Travel(mm)........105 = 105

and without doing any trigonometry...
The rake angle is the same, so different trail, ride height etc. between models could be just different forks, swingarm and tyres, cant see any reference to fork length which would make it easier to know.

I want to build up a road bike and there is probably a KR1 frame local. My KR1-S was Q-plated last time so I dont want to use it. If the KR1 has a different swingarm pivot point then I would rather try and get a KR1-S frame.

Also searching through posts I think there may have been a mention about rigidity/flex being different.

My guess is that the KR1 frame has the same dimensions and I will have the same geometry if I use KR1-S forks and swinger. :-k

thnks
col
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Joined: Wed Jul 26, 2006 8:49 am
Location: Waikato, New Zealand

Post by col »

I'm guessing that the 1s shock is slightly (5mm) longer which would
explain the ride height and geometry.
KwakOn
Oil Injector
Posts: 514
Joined: Wed Jul 26, 2006 9:51 am
Location: Northern Ireland

Post by KwakOn »

yeah could well be.

I will now go for whichever frame I can get, I prefer the looks of the C2 frame is the main thing. it is mostly curiosity to know the exact details.

If I get a B2 chasis I can set two (B2, C2) side by side and measure etc. to compare. I am sure if there is any difference it will be hard for me to notice when actually on track/road.
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