Pinkbike.com
Powered by Outside
pinnit-cycles
- Member since Jan 5, 2021
-
München , Germany - 21 Followers
- 0 Trailforks Points
Recent
pinnit-cycles mattbeer's article
Feb 16, 2023 at 2:27
Feb 16, 2023
Pinnit Cycles Shredmaster - The Armchair Engineer's Dream Is Now For Sale
@hamncheez: I think so :D Until there's a new standard...
pinnit-cycles mattbeer's article
Feb 15, 2023 at 10:41
Feb 15, 2023
Pinnit Cycles Shredmaster - The Armchair Engineer's Dream Is Now For Sale
@mtallman2: maybe this helps:
That is the calculated chain growth (both upper and lower) out of linkage design:
https://www.pinkbike.com/photo/24219511/
Excuse the quality of the pictures, that is the actual chain lengthening
(tested with our prototype tensioner and our new chainstay):
https://www.pinkbike.com/photo/24219512/
-> there needs to be slack at the lower chain (that has to be managed by a tensioner), otherwise the chain would rip when you dive into the travel.
pinnit-cycles mattbeer's article
Feb 15, 2023 at 5:35
Feb 15, 2023
Pinnit Cycles Shredmaster - The Armchair Engineer's Dream Is Now For Sale
@naptime: to be honest, i was just really happy when Matt contacted us for some more info about the new frame iteration, this wasnt really a well planned "press release". Lesson learned^^
pinnit-cycles mattbeer's article
Feb 15, 2023 at 5:33
Feb 15, 2023
Pinnit Cycles Shredmaster - The Armchair Engineer's Dream Is Now For Sale
@vinay: i uploaded the tensioner pic to Pinkbike, does this work for you?
https://www.pinkbike.com/photo/24217859/
The horizontal Roox is more of a chainguide than a tensioner, since it cant compensate too much lengthening by rotating, i dont think it would be enough. On the Commencal i doenst have to do it, because the derailleur does this job.
Added 1 photo to Project-Shredmaster-2020---Gearbox-DH-Frame
Feb 15, 2023 at 5:30
Feb 15, 2023
0 comments –
Add comment
pinnit-cycles mattbeer's article
Feb 15, 2023 at 5:04
Feb 15, 2023
Pinnit Cycles Shredmaster - The Armchair Engineer's Dream Is Now For Sale
@naptime: https://www.instagram.com/p/CJ3J9D_B1nO/ With this tensioner design, I do think it is the perfect spot, wouldnt you agree?
pinnit-cycles mattbeer's article
Feb 15, 2023 at 1:43
Feb 15, 2023
Pinnit Cycles Shredmaster - The Armchair Engineer's Dream Is Now For Sale
You're right, space for the piggy back is one reason (BB bend). Regarding the toptube section bend: is takes the forces from the headtube way better than a straight tube, that would require gussets. And those are a bit hard to simulate/implement!
pinnit-cycles mattbeer's article
Feb 15, 2023 at 1:35
Feb 15, 2023
Pinnit Cycles Shredmaster - The Armchair Engineer's Dream Is Now For Sale
I used the original Pinion tensioner (2 wheel design, similar like the one above from Effi) for one year and it works, because when compressing / stuff hitting it, it starts to rotate towards the rear wheel "out of the way". But its not a nice solution and sometimes rocks, picked up by the front wheel, are tossed into it, leaving scratches. So when our tensioners arrive, we'll switch to them.
Oh and thx :)
pinnit-cycles mattbeer's article
Feb 15, 2023 at 1:30
Feb 15, 2023
Pinnit Cycles Shredmaster - The Armchair Engineer's Dream Is Now For Sale
@bkm303: tHaTs AcTuAlLy KiNdA tRuE!
The tensioner on our first frame worked flawlessly, so we sticked with this design, since it is less prone to be ripped of, and indeed is less unsprung weight. The tensioner on the pics above was just the one that came with the Effigear and we used it to get one frame built until we have ours made.
pinnit-cycles mattbeer's article
Feb 15, 2023 at 1:25
Feb 15, 2023
Pinnit Cycles Shredmaster - The Armchair Engineer's Dream Is Now For Sale
Chain growth in this case (and all others afaik) refers to growth of the upper chain, since that translates into pedal kickback.
In total there always must be, at least some, chain growth. (Unless for example you run a single Pivot point exactly though the BB, like in some slopestyle fullys, so there is zero change in length, that the chain has so deal with.)
That particular tensioner wasnt desgined for high pivot bikes, so the mountain plate is far from ideal for this frame. Our tensioner for this frame (similar like the one on the first frame we made) is not ready yet, so we used this tensioner...
