Update on my situation: The store which sold the bike accepted to cover the cost of a new gearbox Very happy about that. One of the best things about Norway is our consumer protection laws! So I ordered a new gearbox from strida.nl.
I will need to install it myself, though. Wondering if itās better to have a bike mechanic do it? Saw this article on it: Strida KS3 Gearbox Replacement - Strida Canada West
But Iām not sure whether Iāll take my chances. I havenāt done a lot of bike fixing in the past, so I wouldnāt want to mess anything up here, particularly given that itās an expensive part.
That are really good news, I wished that the rest of Europe would have the same customer protection laws!
Iād definitely recommend to look for assistance of a professional bike workshop.
There are also some special tools required, you read Billās advice already?
Bill wrote that he will deliver a replacement drive with an already mounted beltwheel - that will be different with a drive from Strida.nl.
That means you need a special nut to change the belthweel because you have to open (close) the lockring.
Moreover that Iād recommend an electric (or pneumatic) impact driver to open this special nut, thereās a torque key necessary to tighten it.
The workshop should also be able to improvise another tool to hold back the beltwheel.
I think I could help partially - by lending you the required nut (deposit) and selling you a matching 95 mm hook key (~ 30 ā¬).
Most of these hook keys have to be modified, standard types do not fit in many cases.
(You need that hook key anyway later - if you want to adjust belt tension.)
Below an image of the hook key, left the matching, modified one and right the original.
Just so Iām sure I donāt misunderstand: Even a well-equipped bike workshop would have to get some special tools? Then itās absolutely a job for a bike mechanic and not meā¦
Your offer of helping out is very generous. Probably interested Letās work out the details on pm.
Even a best-equipped workshop would not have special Strida tools.
Yes, Iām pretty sure about this.
Especially that thingy below, it is the lockring nut:
I read many cases about Strida EVO gear. Bill the Canadian supplier advised me to stock a spare gear as there will be no more new gears in the market. Maybe the manufacturer realized eventually that they are failing so frequently. I also have the same problem now in less than 2 years of owning it. It seems every EVO will get gear problem sooner or later. And seem most are happening sooner than later. Which make me wonder if this unique gear is problematic by design.
Dear Chris. Thanks for all the good information.
I bought a 95mm hook wrench two years ago and with your information I could see that it only caught on the locking ring by a tiny bit
I am going to try to find a hook wrench with a thinner jaw. Fortunately there seems to be one in my country with a 4 mm jaw tip.
Hello dear Yakitori,
all you need is a grinder, a cup of cold water and some patience.
Grind a little bit off the hookās tip, cool it with the water and repeat.
(Finally, break the sharp edges with sand paper.)
In the end, it should look like the left tip below:
I donāt have that, but Iām afraid to handle a grinder. Anyway, unfortunately I canāt do that here in my small rented room
Itās a pity the KS3 is no longer in production.
Well, the KS3 is only used on the Strida, so itās probably inevitable that itās going out of production, but this gearbox looks beautiful. I donāt know what Europeans think of it, but the Sturmey Archer logo is cool.
Shimano gearboxes are all over the place in this country, but it has a different, special feel to it (at least while it is working properly)
Youāre doing right; if youāre unsure then itās better to keep your hands off from grinders
(With a big lot of patience, the grinding could be done also on a coarse Japanese waterstone - without any danger )
You could also ask a professional knife sharpener.
Yes, what a pityā¦all we can do now is trying to refurbish our KS3 drivesā¦
I think it is really cool that the KS3 drive does not need any external wires or levers to operate - that is smart and unusual.
I see, Well, Iāll be mature and look for another hook wrench
I think it is really cool that the KS3 drive does not need any external wires or levers to operate - that is smart and unusual.
I think youāre right.
I think itās a gearbox that fits perfectly with Stridaās design philosophy of eliminating superfluous frames and structures.
Good luck, if you can not find a matching key please let me know
Iām using a pretty sophisticated machine btw; did you ever hear of āsee-throughā grinding?
It is extremely practical and convenient to see directly onto the surface during the process: https://www.youtube.com/watch?v=aEF3_HWYYuM
Thank you.
Oh, thatās great! I didnāt know such a thing existed.
In my country it seems to be totally unknown.
I donāt have the opportunity to sharpen tools, but I know that grinders are needed to grind tools for machine tools. And those perforated discs seem very useful to grind end mills and Tool bits evenly.
I think that machine would sell just fine outside of Germany with a good salesman. But arenāt the replacement discs very expensive?
Interesting, if you donāt mind, Iād like to know by PM or email what you usually sharpen with it.
BTW, is the grinder-shaved hook wrench in this photo originally a USAG wrench? (92-95-100?)
Thatās no secret, using it mainly for hard metal lathe tools, centre punches and Kujiris (= Japanese pricking awls), occasionally for turning tools (woodworking) and knives
Thanks. I didnāt know about the Japanese tool, but it seems that āKujiriā is the correct name, not āKujirisā. I used to use a center punch, but I bought one for woodworking because it looks useful.
Very happy about that. One of the best things about Norway is our consumer protection laws! So I ordered a new gearbox from strida.nl.
