New sus forks for old

I run 100mm forks on my Caldera originally speced with 63mm forks

&

I run 63mm forks on my RTS that was originally speced with 48mm forks + these forks may be replaced with 80mm forks.


IMHO neither of which disrupt the handling too much in my eyes.

Modern RS forks have quite a short axle to crown height height compared with modern MArzochhi forks.

Sarah Beeny thread here >> http://www.retrobike.co.uk/forum/viewtopic.php?t=40453&highlight=sarah
 
Found this on another forum... your after about 450mm I guess

2007 Models Axel to Crown

Corsa WC 80mm 464mm
Corsa WC 100mm 474mm
XC700 SL 464-504mm
XC600 474mm
XC500 474mm
Z1 RC2 538mm
Drop Off 3 538mm
AM SL 1 511-551mm
AM 2 531mm
AM 3 531mm
4X WC ?
DJ 1 483mm
DJ 2 483mm
DJ 3 483mm
Dirt Jam Pro 483mm
66 SL 1 ATA 525-565mm
66 RC2X 565mm
66 RC2 ETA 565mm
888 WC 584mm
888 SL ATA 554-584mm
888 RC2X VA 584mm
888 RV 584mm
Super T RCV 574mm
MX Pro ETA 508mm
MX Pro ETA 488mm
MX Pro 488mm
MX Pro 468mm
MX Comp 1" 468mm
MX Pro I.S. 488mm

CANNONDALE

lefty 140 spv : 510 mm

FOX

vanilla R 2005: 510 mm
Talas RL 2004: 490 mm
Talas RLC 2006: 503mm
vanilla 2004 un peu moins de 500 mm
Float 80mm : 451mm
100mm : 471mm


36 Talas(2006) en 150mm : 535mm
en 110mm : 495mm
36VAN RC2 (2006) en 160: 545mm
40 (2006) : en 178mm : 546mm
-------------- en 203mm : 571mm

MARZO

Z1 130mm drop off QR20: 503mm (2001)
Z1 FR SL (2003) 530 mm
Z1 FR 130 (2005): 518mm
Z1 FR 150 (2005): 538 mm
Z1 MCR (2001)130: 510mm
Z1 LIGHT ETA 150mm (2006): 538.5mm
Z3 Flylight 100mm (2000): 500mm
Z5 air en 100 (2001): 478 mm
888 (2005) en 200mm, 605mm
888 (2005) en 170mm, 575mm
888 (2006) en 200mm: 579mm
66 (2005) en 170mm, 595mm
66 (2005) en 150mm, 575mm
66 (2006) en 170mm: 555mm
66 (2006) en 150mm: 535mm
Marathon S millésime 2002 100mm -> 480 mm
Marathon S 120mm (2005): 495mm
Marathon XC 120mm 2005: 495mm
MX Comp en 105mm: 478 mm
MX Comp en 105mm (2006): 484.3mm
MX Comp en 120 mm : 493 mm
MX Comp en 120mm (2006): 499mm
MX Comp en 85 mm : 458 mm
MZ comp en 100 mm: 488 mm
EXR PRO en 105 mm: 478 mm
EXR PRO en 120 mm: 493 mm
all mountain 110 498mm
all mountain 130: 518 mm
all mountain 150 (2005): 538 mm
all mountain 150 (2006): 541.5mm
DJ2 2004 = 500mm
DJ en 100 mm (2005): 488 mm
DIRT JUMPER (2006) en 100mm: 483.5mm
shiver sc 120 mm : 510 mm
shiver DC: 572mm
Junior T 2003/2004/2005: 555mm
Junior T 2001 = 540mm
Monster en 200 mm: 595 mm

ROCK SHOX

pike: 517mm
Lyric en 160mm: 545mm +/- 5mm
Domain en 180mm: 565mm +/- 5mm
Totem en 180mm: 565mm +/- 5mm
Reba 85mm: 458mm
Reba en 100 mm : 473 mm
reba 115mm: 488mm
Boxxer 04 (178mm de débattement), 555mm en position basse
Boxxer 2005 race, team et world cup en 203mm : 570mm en position basse
Psylo SL uturn : 510 mm
Duke XC 80 mm 2004 : 460 mm
Duke C (année inconnue) 80 mm de dbt : 440 mm
Pilot en 100mm : 475mm
SID RACE 80mm: 442mm
SID SL 2001 80mm: 450mm
SID 1998 63mm : 435mm
Revelation 130mm (2006): 508mm
Revelation 100mm (2006): 478mm

PACE

Distance RC 39 modèle 2005 en 100 mm: 470mm
RC41 Fighter en 150mm 2006: 524mm


MANITOU

Axel Elite 100mm : 480mm
Skareb Super TPC 100mm (modéle 2005): 475 mm
Black Platinum (Reglage maximum):515mm
black comp 2002: 475mm en debat 100mm
Stance Flow:502/532mm
Stance Kingpin: 540mm
Stance Static 80mm: 460mm
Stance Static 100mm: 480mm
Dorado DH: 542.5mm
Sherman Breakout Plus: 512/552mm
Sherman Flick Plus: 492/532mm
Sherman Firefly Plus: 492/532mm
Sherman Jumper: 455mm
Sherman Jumper 110mm : 480mm
Sherman Slider Plus: 540mm
Nixon Platinum/Super/Elite: 518mm
Minute 1/2/3: 505mm
Minute 3 (en 100mm): 470 mm
Millenium: 505mm
Splice 100 mm: 505mm
Splice Elite 130mm : 525mm
R7 (2006) en 100mm: 470mm


MAGURA

Big Ego en 185 mm : 580 mm
Thor en 150 mm : 535 mm
Ronin en 110 mm : 483 mm
Phaon en 125 mm : 504 mm
Asgard en 100 mm : 476 mm
Asgard en 80 mm : 456 mm
Vidar en 80 mm : 456 mm
Quake 115 double té: 525 mm
 
Wow @ that ^

Thanks! The Pickle might have hit top trumps so I should be alright.

Checking out the dimensions yesterday it's interesting to see how much they've changed. Bottom to crown on my Judy's is 440mm, only one Rock Shox comes close; the Duke 03-05 at 439mm.

The way this re-build is heading is that everything is going to new except the frame and fork.
 
if its a '97 Kona then you can bang pretty much any fork on it you want up to 100mm travel regardless of axle to crown i think. After '94 Kona never altered their hardtail geometry meaning that your Kona has the same geometry as a modern day Kula. So i've was told by our number 1 Kona guru Anthony. I run an '04 Fox Float 100RL on my '95 Kilauea and it handles just fine
 
Modern Konas have slightly slacker angles. The modern HT´s like the Kula have a HA of 69.4, whereas older models were around 71 degrees.
 
Forks

Don't fanny around, just get a set of Rockshox dual air 100 or 120 matters not. You can adjust the travel from zero to max with the two air chambers, they are stiff, light and ramp up well. Fox are unreliable and too linear with no ramp up. Marzocchi are just garbage awful junk. My LBS sells all the current makes and they have less trouble with modern RS than anything else and sell twice as many as anything else. They get more than half the Fox back and more of the Marzocchi.
Strangely they have few problems with modern Manitous too.
 
On my Hei Hei I'm running a Recon U-Turn lowered by swapping the standard spring with the one from a Duke U-turn.

This way I get the stiffness of a modern fork, a short axle to crown lenght, and some extra travel for the downhills.

Air forks from Rock Shox can also be lowered by using nylon spacers.
 
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