|
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Shorter cranks on Double Vision
I did a Google search to see if any new pertinent information had come to
light lately. All that popped up were posts of mine, expounding the gloriousness of shorter cranks. I am at least a year into using shorter cranks (165's) and I positively have no knee pain on my single bike. The tandem (Double Vision) has 175's and my knee always hurts when we ride it. Any new ideas on shortening cranks on the DV? I called Vision and Ricky Comar said it would cost about $15,000. Machining, R& D, prototypes, etc. (I have heard that Ricky Comar is not at Vision anymore...) Perry bentcajungirl down to just a Double Vision New R-40 Husband's R-44 and still the El Camino. |
Ads |
#2
|
|||
|
|||
Shorter cranks on Double Vision
Hello:
if you donot have IPS or splined crank i know of a machine shop that will drill and tap them out for you. if intrested please e-mail me back. Thank you Earl GRR,RANS V2 Ti Rush,Ti Pursuit |
#3
|
|||
|
|||
Shorter cranks on Double Vision
Hi Earl,
I do have IPS. (and I believe they're tapered) Why does that make a difference? Perry "Guess Who I Am" wrote in message ... Hello: if you donot have IPS or splined crank i know of a machine shop that will drill and tap them out for you. if intrested please e-mail me back. Thank you Earl GRR,RANS V2 Ti Rush,Ti Pursuit |
#4
|
|||
|
|||
Shorter cranks on Double Vision
Perry, I do not know if the DV is something unique or just uses
regular tandem components. Maybe what I am posting is useless to you. But hopefully it is not. St. John Street Cycles. http://www.sjscycles.com/store/vIndex.htm has beautiful Thorn cranks for front and rear tandems 140-175mm In the index do NOT look under cranksets. Look under "Chainsets" then "Tandem chainsets/cranks". I have a triple solo from them in 150mm and it is very nicely done. I picked the TA rings. Their polish matches the crank and they are ramped and pinned. Note which are marked outer, middle, and inner. Please note on pricing, US customers do not have to pay the value added tax so the listed price must be reduced by that amount. Also, when I ordered the arms, rings, and bolts I was promptly informed that what I ordered was considered a kit so they assembled it for me and greatly reduced the price. Delivered to my door in Sacramento from Jolly Olde in 9 days from my order. Nice chaps to deal with. Spot on and all that rot. Good luck. Don |
#5
|
|||
|
|||
Shorter cranks on Double Vision
"Perry" wrote in message ...
snip Any new ideas on shortening cranks on the DV? I called Vision and Ricky Comar said it would cost about $15,000. Machining, R& D, prototypes, etc. (I have heard that Ricky Comar is not at Vision anymore...) Yeah, Ricky left a couple months back. Regarding the cranksets: the IPS system required some special machining to accomodate the freewheel mechanism. A really good machinist might be able to set up shorter cranks for IPS- but it's fairly sensitive. You might want to talk to someone familiar with machining and bicycles... perhaps Longbikes or Terracycle. OTOH- ask yourself how often you use the IPS system. If you think you can get away with captain-only freewheeling (that is, the captain could coast on his own, but the stoker would be forced to pedal when the captain pedaled) then you could replace the stoker cranks with standard, but shorter cranks. That's certainly the least expensive proposition. Jeff |
#6
|
|||
|
|||
Shorter cranks on Double Vision
Thanks, Don. I just emailed them.
Perry "Don" wrote in message om... Perry, I do not know if the DV is something unique or just uses regular tandem components. Maybe what I am posting is useless to you. But hopefully it is not. St. John Street Cycles. http://www.sjscycles.com/store/vIndex.htm has beautiful Thorn cranks for front and rear tandems 140-175mm In the index do NOT look under cranksets. Look under "Chainsets" then "Tandem chainsets/cranks". I have a triple solo from them in 150mm and it is very nicely done. I picked the TA rings. Their polish matches the crank and they are ramped and pinned. Note which are marked outer, middle, and inner. Please note on pricing, US customers do not have to pay the value added tax so the listed price must be reduced by that amount. Also, when I ordered the arms, rings, and bolts I was promptly informed that what I ordered was considered a kit so they assembled it for me and greatly reduced the price. Delivered to my door in Sacramento from Jolly Olde in 9 days from my order. Nice chaps to deal with. Spot on and all that rot. Good luck. Don |
#7
|
|||
|
|||
Shorter cranks on Double Vision
I run 145mm cranks on my trike and I'm a convert. Stopped my knee pain.
Smoother and higher cadence. If it's all in the mind, it worked for me. MR now supply 155mm cranks on their Swiftlet S2. Paul W |
#8
|
|||
|
|||
Shorter cranks on Double Vision
Perry:
i'm sorry they can tap out your ips tapered cranks. the shop is Custom Machinery in Schiller Park ,il. if intrested contact Len at: Thank you Earl GRR,RANS V2 Ti Rush,Ti Pursuit |
#9
|
|||
|
|||
Shorter cranks on Double Vision
There is positively NO WAY I will ever give up IPS. Not until they pry my
cold dead toes from my Frogs. With a big battleship hulking bike like the Double Vision, there are just too many needs for the IPS. Perry "Prints" wrote in message ... I run 145mm cranks on my trike and I'm a convert. Stopped my knee pain. Smoother and higher cadence. If it's all in the mind, it worked for me. MR now supply 155mm cranks on their Swiftlet S2. Paul W |
#10
|
|||
|
|||
Shorter cranks on Double Vision
In article , Perry says...
There is positively NO WAY I will ever give up IPS. Not until they pry my cold dead toes from my Frogs. What a GREAT line to be overheard by somone who has no knowledge of cycling. "Just what were your toes doing on your Frogs?" Steve Christensen |
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
An observations about Q-Factor and Crank Length | Greg Lewis | Techniques | 10 | February 13th 04 03:22 PM |
Stockpiling 110mm/74mm chainrings and cranks | Rocketman | General | 15 | November 13th 03 08:32 PM |
Stockpiling 110mm/74mm chainrings and cranks | Rocketman | Techniques | 16 | November 13th 03 08:32 PM |