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#1
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Sturdy rack for sull suspension MTB
After the boom of my otherwise quite tough seat post rack buckled during
a gnarly ride with heavy load I modified things: http://www.analogconsultants.com/ng/bike/Muddy4.JPG The seat post clamp is very beefy and I was custom-made in a machine shop. It has old tube snippets laid inside. Four 1/4" bolts. The strut is U-shaped aircraft-grade aluminum and bolted to a false bottom with 6mm screws. The false bottom can be seen in the old version: http://www.analogconsultants.com/ng/bike/Battbox2.JPG The panniers are held on with a 0.200" Perspex plate, slightly spring-loaded, so they don't whop up and down during rough rides. The little box on the strut contains a four-cell 18650 battery block to keep the lights going. I will add an electronics box with more features to tie in the MP3 player and maybe a cell phone charger. Or maybe a GPS some day. I also installed the longest seat tube I could find (400mm). Aside from allowing some serious loads to be carried this strut has also completely eliminated the frame and seat tube squeaking. On a scary steep downhills I can now even temporarily plant my behind on the rack. -- Regards, Joerg http://www.analogconsultants.com/ |
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#2
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Sturdy rack for sull suspension MTB
On 10/24/2017 12:06 PM, Joerg wrote:
After the boom of my otherwise quite tough seat post rack buckled during a gnarly ride with heavy load I modified things: http://www.analogconsultants.com/ng/bike/Muddy4.JPG The seat post clamp is very beefy and I was custom-made in a machine shop. It has old tube snippets laid inside. Four 1/4" bolts. The strut is U-shaped aircraft-grade aluminum and bolted to a false bottom with 6mm screws. The false bottom can be seen in the old version: http://www.analogconsultants.com/ng/bike/Battbox2.JPG The panniers are held on with a 0.200" Perspex plate, slightly spring-loaded, so they don't whop up and down during rough rides. The little box on the strut contains a four-cell 18650 battery block to keep the lights going. I will add an electronics box with more features to tie in the MP3 player and maybe a cell phone charger. Or maybe a GPS some day. I also installed the longest seat tube I could find (400mm). Aside from allowing some serious loads to be carried this strut has also completely eliminated the frame and seat tube squeaking. On a scary steep downhills I can now even temporarily plant my behind on the rack. I SPIT on seatpost mounted racks. |
#3
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Sturdy rack for sull suspension MTB
On 2017-10-24 12:28, sms wrote:
On 10/24/2017 12:06 PM, Joerg wrote: After the boom of my otherwise quite tough seat post rack buckled during a gnarly ride with heavy load I modified things: http://www.analogconsultants.com/ng/bike/Muddy4.JPG The seat post clamp is very beefy and I was custom-made in a machine shop. It has old tube snippets laid inside. Four 1/4" bolts. The strut is U-shaped aircraft-grade aluminum and bolted to a false bottom with 6mm screws. The false bottom can be seen in the old version: http://www.analogconsultants.com/ng/bike/Battbox2.JPG The panniers are held on with a 0.200" Perspex plate, slightly spring-loaded, so they don't whop up and down during rough rides. The little box on the strut contains a four-cell 18650 battery block to keep the lights going. I will add an electronics box with more features to tie in the MP3 player and maybe a cell phone charger. Or maybe a GPS some day. I also installed the longest seat tube I could find (400mm). Aside from allowing some serious loads to be carried this strut has also completely eliminated the frame and seat tube squeaking. On a scary steep downhills I can now even temporarily plant my behind on the rack. I SPIT on seatpost mounted racks. Well, how else do you propose to do that on a full-sus MTB? Bolting it to the diagonal frame struts is out because it can quickly destroy those with heavy loads. Also, the whole cargo would become unsprung mass, making for a very uncomfortable ride and possibly damaged cargo. -- Regards, Joerg http://www.analogconsultants.com/ |
#4
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Sturdy rack for sull suspension MTB
On Tuesday, October 24, 2017 at 12:38:15 PM UTC-7, Joerg wrote:
On 2017-10-24 12:28, sms wrote: On 10/24/2017 12:06 PM, Joerg wrote: After the boom of my otherwise quite tough seat post rack buckled during a gnarly ride with heavy load I modified things: http://www.analogconsultants.com/ng/bike/Muddy4.JPG The seat post clamp is very beefy and I was custom-made in a machine shop. It has old tube snippets laid inside. Four 1/4" bolts. The strut is U-shaped aircraft-grade aluminum and bolted to a false bottom with 6mm screws. The false bottom can be seen in the old version: http://www.analogconsultants.com/ng/bike/Battbox2.JPG The panniers are held on with a 0.200" Perspex plate, slightly spring-loaded, so they don't whop up and down during rough rides. The little box on the strut contains a four-cell 18650 battery block to keep the lights going. I will add an electronics box with more features to tie in the MP3 player and maybe a cell phone charger. Or maybe a GPS some day. I also installed the longest seat tube I could find (400mm). Aside from allowing some serious loads to be carried this strut has also completely eliminated the frame and seat tube squeaking. On a scary steep downhills I can now even temporarily plant my behind on the rack. I SPIT on seatpost mounted racks. Well, how else do you propose to do that on a full-sus MTB? Bolting it to the diagonal frame struts is out because it can quickly destroy those with heavy loads. Also, the whole cargo would become unsprung mass, making for a very uncomfortable ride and possibly damaged cargo. -- Regards, Joerg http://www.analogconsultants.com/ Have a drone carry it |
#5
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Sturdy rack for sull suspension MTB
On Tuesday, October 24, 2017 at 12:38:15 PM UTC-7, Joerg wrote:
On 2017-10-24 12:28, sms wrote: On 10/24/2017 12:06 PM, Joerg wrote: After the boom of my otherwise quite tough seat post rack buckled during a gnarly ride with heavy load I modified things: http://www.analogconsultants.com/ng/bike/Muddy4.JPG The seat post clamp is very beefy and I was custom-made in a machine shop. It has old tube snippets laid inside. Four 1/4" bolts. The strut is U-shaped aircraft-grade aluminum and bolted to a false bottom with 6mm screws. The false bottom can be seen in the old version: http://www.analogconsultants.com/ng/bike/Battbox2.JPG The panniers are held on with a 0.200" Perspex plate, slightly spring-loaded, so they don't whop up and down during rough rides. The little box on the strut contains a four-cell 18650 battery block to keep the lights going. I will add an electronics box with more features to tie in the MP3 player and maybe a cell phone charger. Or maybe a GPS some day. I also installed the longest seat tube I could find (400mm). Aside from allowing some serious loads to be carried this strut has also completely eliminated the frame and seat tube squeaking. On a scary steep downhills I can now even temporarily plant my behind on the rack. I SPIT on seatpost mounted racks. Well, how else do you propose to do that on a full-sus MTB? Bolting it to the diagonal frame struts is out because it can quickly destroy those with heavy loads. Also, the whole cargo would become unsprung mass, making for a very uncomfortable ride and possibly damaged cargo. It appears that you've done a good engineering job of what you were trying to accomplish. But that makes the entire mess so heavy that you must have abs like the Hulk. |
#6
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Sturdy rack for sull suspension MTB
On 10/24/2017 12:38 PM, Joerg wrote:
On 2017-10-24 12:28, sms wrote: On 10/24/2017 12:06 PM, Joerg wrote: After the boom of my otherwise quite tough seat post rack buckled during a gnarly ride with heavy load I modified things: http://www.analogconsultants.com/ng/bike/Muddy4.JPG The seat post clamp is very beefy and I was custom-made in a machine shop. It has old tube snippets laid inside. Four 1/4" bolts. The strut is U-shaped aircraft-grade aluminum and bolted to a false bottom with 6mm screws. The false bottom can be seen in the old version: http://www.analogconsultants.com/ng/bike/Battbox2.JPG The panniers are held on with a 0.200" Perspex plate, slightly spring-loaded, so they don't whop up and down during rough rides. The little box on the strut contains a four-cell 18650 battery block to keep the lights going. I will add an electronics box with more features to tie in the MP3 player and maybe a cell phone charger. Or maybe a GPS some day. I also installed the longest seat tube I could find (400mm). Aside from allowing some serious loads to be carried this strut has also completely eliminated the frame and seat tube squeaking. On a scary steep downhills I can now even temporarily plant my behind on the rack. I SPIT on seatpost mounted racks. Well, how else do you propose to do that on a full-sus MTB? Bolting it to the diagonal frame struts is out because it can quickly destroy those with heavy loads. Also, the whole cargo would become unsprung mass, making for a very uncomfortable ride and possibly damaged cargo. Old Man Mountain Sherpa Rear Rack |
#8
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Sturdy rack for sull suspension MTB
On 2017-10-24 14:05, sms wrote:
On 10/24/2017 12:38 PM, Joerg wrote: On 2017-10-24 12:28, sms wrote: On 10/24/2017 12:06 PM, Joerg wrote: After the boom of my otherwise quite tough seat post rack buckled during a gnarly ride with heavy load I modified things: http://www.analogconsultants.com/ng/bike/Muddy4.JPG The seat post clamp is very beefy and I was custom-made in a machine shop. It has old tube snippets laid inside. Four 1/4" bolts. The strut is U-shaped aircraft-grade aluminum and bolted to a false bottom with 6mm screws. The false bottom can be seen in the old version: http://www.analogconsultants.com/ng/bike/Battbox2.JPG The panniers are held on with a 0.200" Perspex plate, slightly spring-loaded, so they don't whop up and down during rough rides. The little box on the strut contains a four-cell 18650 battery block to keep the lights going. I will add an electronics box with more features to tie in the MP3 player and maybe a cell phone charger. Or maybe a GPS some day. I also installed the longest seat tube I could find (400mm). Aside from allowing some serious loads to be carried this strut has also completely eliminated the frame and seat tube squeaking. On a scary steep downhills I can now even temporarily plant my behind on the rack. I SPIT on seatpost mounted racks. Well, how else do you propose to do that on a full-sus MTB? Bolting it to the diagonal frame struts is out because it can quickly destroy those with heavy loads. Also, the whole cargo would become unsprung mass, making for a very uncomfortable ride and possibly damaged cargo. Old Man Mountain Sherpa Rear Rack A backpack? Never no more. While they do have the major advantage of protection the spine in a bad prang they cause my back to be completely soaked in sweat after just a few miles. 10mi farther down the trail a nasty sholder harness rash sets in. There is also the minor problem of not being able to transport bulky packages or machine parts in a backpack. -- Regards, Joerg http://www.analogconsultants.com/ |
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