I found the product information page for A5-RE. Apparently it is a friction damper. No oil.
A5-RR1 version adds a topout adjustment. It would be about 180g weight saving compared to the coil, if I remember correctly.
But realistically, for the amount of travel, and stiction in suspension, not much damping is needed. I keep X2 fully open.
There is 5.5x1.0 Fox. I wonder if it could be made to work by flipping the link and adding a 5mm internal shim (or making it 100mm rear travel). By looking at the picture it seems that rotating the link backwards will easily add about an inch eye to eye distance.
I have fliped the links up side down on both bikes, (spark JR RC 24 and 20).
But before I had cut a piece of "cable stop." In this position the suspension is much softer and travel is longer.
Hi,
I just installed a rear shock A5 KS to spark 20
Suitable bushes from coil stock shock.
It weighs 170 g with mounting bushes.
The stock coil shock weighs 290 g (with bushes)
KS A5 it is a friction damper - it is loud. Works like poof, zzzzz, poof, zzzz
Dumping is not sufficient. It works as a stock coil shock without dumping with pogo effect.
X-Fusion 02 from spark 24 is much better (I have one in spark RC)
It is difficult for me to write, I do not know English well.
Thanks Heckler11 - your English was good enough to get the point! It sounds like the A5 KS sucks. I plan to stick with the stock shock until I can come up with something better like a used X-fusion that shows up on Ebay or something. Thank you for the write up.
I will try measuring today what flipping the link gets. Shimmed 140 x 25 stroke Fox would probably be a better choice if it can be fitted. I may have an XFusion for sale then...if I can get more then half price of the cheapest new old stock 140x25 I can find.
Hi,
I just finished building spark 20th
It weighs now 9.07 kg / 19.99 LBS with tuned fork RST Capa, titan BB 160 g, titan skewers 32 g, lite kcnc v-brake 200g/pairs, XTR shifter 1x9, XT casette 11-32 with chain, light alu cables.
Now I think it's a little pointless it was. A lot of work, a lot of money, the lack of a true rear schock (kind A5), and still not too light.
But we'll see in the spring how it will go.
It's possible to building 8,5 kg/18,7 LBS but you now, $$$$$$$ to much.
Next bike (for next children) probably from islabikess.
Soon I'll make pictures and show you.
What does mean 'killer build"?
the fork is stock, but tuned - changed steerer tube from cro-moly to aluminium, and cuted litle parts.
Weight before 1,69 kg, now 1,54 kg. Total lenght is 38 cm, stroke before 3, 5 cm, now 5 cm.
Sorry about that.... "Killer build" translates to "You did a good job improving that bike by choosing nice parts that look good"
And I intended to asked about the stroke/eye-to-eye distance on the new rear shock. I used the wrong term. I was trying to figure out how much replacing a rear shock on a Spark would cost, and I was looking for a suitable replacement shock online. Maybe an easier question for you to answer is, "where did you get the rear shock?"
I rode today with my son, and i saw that KS A5 works unexpected good. Not pumped (pogo effect) as old shock, on the small obstacless worked really good (sensitive, plush).
Only the travel is litlle shorter, but it's not a big problem. And suppression could only be stronger.
I bought a set of cheap Circus Monkey 28h hubs off Ebay, some light Alex rims and had LBS lace it up for me (too much time by myself). I found that most everything available is much too heavy, with BMX rims.
I did the same. Circus Monkeys 28h off EBay, Alienation Deviant rims. Makes a light wheelset. I don't think there are any commercially available disc 20" wheels, and if there are, they would be HEAVY.
OK thanks, can I have opinion on which to get; circus monkeys, aleination, sun ringle envy lite or cr-18. and what specifics should i look for when shopping. rim depth, width what hole count
I don't think you want the CR-18. I believe it is a mini rim with a 451 diameter. I've used the Alienation Deviant for disc brakes and the Crupi Rhythm expert 20 x 1.50" with rim brakes, both of which have the 406 diameter, which will give you more appropriate tire choices for a mt. bike.
Any, if you have a single front ring. If I was building again, I would use the same setup as on my light bike - front SS ring with no guards (waiting on wide/narrow Raceface, but even current Salsa does not drop chains) and Zee short cage derailleur with 11-36 cassette and Saint shifter (it has longer levers, much easier to shift) - ordered from Germany they are cheaper than 9sp stuff...
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