Stumpjumper clone

[Cube78]

Hello everybody,
Since I am also interested in this subject, I am in contact with Airwolf and asked about the possible suspension travel. I received the following picture from the design department.
is it correct that the max travel is 142 mm?

[swuw231]

A little update, I sourced a couple of parts from the original stumpy and Im happy to report that they all fit , I got the following:

-Rear thru axle 148x12 (S170200003), not much to say, it worked
-Downtube protector (S184200063), required drilling of 2 bolts for installation
-Chainstay protector (S186900003), surprisingly chainstay protector fitted like a glove and there was even existing thread in the back of the horst link bolts to attach the screw
-Bearing repleacement kit (S180600003), were quite a pain to replace but new ones are quite smooth
-Rear Shock hardware kit (S184200068), flip chip hardware matches the grooves in the suspension yoke but is quite a tight fit (yoke is ~1.5 mm narrower)

Im still waiting for parts but in the meantime maybe Ill build it as a 27.5+ as I have some spares.

[Jotegr]

wow, that's some really good compatibility for a knockoff frame.

[Gigelz]

@swuw231 do you think it is possible to use a 210mm long shock and a 150mm fork ?

[swuw231]

Yes, as stated before 210mm seems to be the max shock lenght that will fit, anything bigger will cause the yoke to be missaligned, therefore making impossible to fit upper shock mount; regarding the fork, it requires a 560mm axle to crown which is almost what a Fox 29er 150mm measures.

[Cube78]

They give a shok with 190x50 max. That a 210 fits in there is strange

[Gigelz]

@swuw231 Woop, thanks ! You are right, you wrote before about max shock lengh and frame travel. Definitely a possible alternative to the hightower clone then. How tall are you and how long are your legs ? Which size did you order ?

@cube78 in this case there is nothing wierd. Original stumpy has this feature too.

[Cube78]

@Gigelz
ok i didn't know that, then the 140mm travel should also be feasible right?

[Gigelz]

@Cube78 i think you need 50mm stroke for the 140mm travel. if you want to go with a smaller fork in the front, you can use a 190x51 or 200x51 shock. if you want to go with a 150 or 160 fork, maybe it makes sense to use a 210x50 shock to compensate the geometry change. you can take a look on the speci website bike archiv. stumpy 2019 should be the same.

[Cube78]

Can anyone tell me whether the damper length is specified in Imperial or Metric?
the manufacturer recommends a length of 190x50, here you recommend 210x50
sorry for the stupid question but i don't get it

[swuw231]

@swuw231 Woop, thanks ! You are right, you wrote before about max shock lengh and frame travel. Definitely a possible alternative to the hightower clone then. How tall are you and how long are your legs ? Which size did you order ?

Im 5'11" with a 32" inseam and picked a medium frame.

Can anyone tell me whether the damper length is specified in Imperial or Metric?
the manufacturer recommends a length of 190x50, here you recommend 210x50
sorry for the stupid question but i don't get it

No one is recommending a 210mm shock, Im just stating the maximum length which seems to be supported by the frame, you can use whatever shock length you want as long as you understand its effects on geometry, 190mm shock number may have come from early development of the frame, if you check the geometry chart, it can clearly be seen that length was chosen having in mind the old iteration of the suspension yoke, many things have improved since then and now the frame is clearly more inline with the actual stumpy.

[Cube78]

@swuw231
Ok fine
Thank you very much for your detailed answer
Do you already know which damper you will use?

[Gigelz]

Im 5'11" with a 32" inseam and picked a medium frame.

No one is recommending a 210mm shock, Im just stating the maximum length which seems to be supported by the frame, you can use whatever shock length you want as long as you understand its effects on geometry, 190mm shock number may have come from early development of the frame, if you check the geometry chart, it can clearly be seen that length was chosen having in mind the old iteration of the suspension yoke, many things have improved since then and now the frame is clearly more inline with the actual stumpy.

thanks for pointing on that fact that they used a different link in the geometry chart. i am pretty sure that 190mm is too short and you will ruin the geometry. 200mm or 210mm is the right choice, depending on the fork travel.

[Thrill21]

Received my frame. This is my second full suspension 'knock off' that I have purchased. The first one, little shorter travel and dated (68 head tube angle). Finish was good, but this frame has really open my eyes. I currently have it taken apart. I can rush it and put it together but it won't do it justice. The linkage has decent bearings, after reading the post I see the other user has updated parts on it. I will most likely do the same. Took it to my buddy who's a specialized dealer - currently in Ontario, all specialized enduro or stump jumpers have already sold out. He could not believe how close it is. Another detail that almost makes me want to do it is on the down tube is an impression for the swat box. Makes be think that it is meant to be cut out. The downtube is quite oval like the stump jumper. They definitely manufactured this bike at some point. Communication was decent, all through messaging on aliexpress. More to follow.

[Thrill21]

A little update, I sourced a couple of parts from the original stumpy and Im happy to report that they all fit , I got the following:

-Rear thru axle 148x12 (S170200003), not much to say, it worked
-Downtube protector (S184200063), required drilling of 2 bolts for installation
-Chainstay protector (S186900003), surprisingly chainstay protector fitted like a glove and there was even existing thread in the back of the horst link bolts to attach the screw
-Bearing repleacement kit (S180600003), were quite a pain to replace but new ones are quite smooth
-Rear Shock hardware kit (S184200068), flip chip hardware matches the grooves in the suspension yoke but is quite a tight fit (yoke is ~1.5 mm narrower)



Im still waiting for parts but in the meantime maybe Ill build it as a 27.5+ as I have some spares.

Ya man! Wicked, thank you for posting these, I am going to do the same! Cheers.