I'm with Joe on this. I suspect you've got 4 visible arms and a hidden 5th one. Like a sugino or a ritchey. That being the case, your measurements and conclusions are right (94/58) and you should be able to find rings. Let me know what rings you want, and I might be able to hook you up. Trade/sell/player to be named later. Whatever
On Monday, January 18, 2016 at 1:36:58 PM UTC-8, Joe Bernard wrote: > > I did some searching and found 58/94 Cook Bros cranks with a hidden 5th > bolt behind the crankarm. I think that's what you have. > > On Monday, January 18, 2016 at 12:50:32 PM UTC-8, hsmitham wrote: >> >> If I use this chart my BCD isn't even there? >> >> >> https://www.bikeman.com/bicycle-repair-tech-info/bikeman-tech-info/1628-chainring-bcd >> >> ~Hugh >> >> “Life is like riding a bicycle. To keep your balance, you must keep >> moving.” ― Albert Einstein >> >> http://velocipeedemusings.com/ >> >> >> >> On Mon, Jan 18, 2016 at 12:41 PM, Bill Lindsay <tape...@gmail.com> wrote: >> >>> Hugh >>> >>> There's a conflict in your measurement procedure, or I'm confused, or >>> both. >>> >>> You say your chainrings all are 4-bolt. That is to say, each chainring >>> is held to the spider with four chainring bolts. Is this right? If so, >>> you measure the BCD by measuring OPPOSITE bolts, not adjacent bolts. If >>> it's 94mm BCD, it will measure 94mm. >>> >>> You say you used the linked chart, but that linked chart is exclusively >>> for 5-bolt rings. 5-bolt rings have no opposite bolt to measure, so you >>> measure the adjacent one and look it up on the chart. >>> >>> So, if you really have 5-bolt rings, then you did the right measurement >>> and you came up with the right BCDs. Rings in the $20 range are findable >>> for that BCD, and are all decent. >>> >>> But, if you really have 4-bolt rings and really measured the adjacent >>> bolts at 34mm and 55mm respectively, then you don't have 58 and 94mm BCDs >>> respectively. >>> Bill Lindsay >>> El Cerrito, CA >>> >>> >>> On Monday, January 18, 2016 at 9:53:00 AM UTC-8, hsmitham wrote: >>>> >>>> Hello Rivendellians, >>>> >>>> I have a 1995 Salsa Ala Carte and I'd like to rehab it with a new drive >>>> and cockpit. It has the original Salsa chromoly stem 130mm and have >>>> considered throwing on a Ritchey 30º rise 80mm stem & straight MTB bar for >>>> more comfort. The current setup I'm pretty stretched out.The old rapid >>>> fire >>>> shifters just don't work, I've tried lot's of things to get the shifter >>>> working (advice from LBS) but it seems easier to just buy new one's. >>>> >>>> The drive is 8 speed and has a Cook Bros Crank *(they went out of >>>> business in the early 2000's) which has a 4 bolt spider. I measured the >>>> inner bolts distance between adjacent bolts and determined it was a 58mm >>>> BCD ring, I also measured the outside bolts between adjacent bolts and >>>> figure it's a 94mm BCD ring. I used this chart which seemed the only one >>>> that had my measurements, 34mm & 55mm respectively. It seems MTB's with >>>> all >>>> the new tech have left these BCD's behind. >>>> >>>> >>>> http://www.bikeforums.net/classic-vintage/704206-chainring-bcd-chart.html >>>> >>>> I went to the Peter White page and found this page >>>> http://www.peterwhitecycles.com/chainrings.asp >>>> >>>> The TA Carmina rings seem like the right ones? But man are they >>>> expensive! >>>> >>>> Is the bike worth keeping it somewhat period/vintage? Have I measured >>>> this correctly? Are there other ring manufacturers making these ring sizes >>>> and importantly less expensive. I've seen Vuelta and Real rings but just >>>> don't know whether their quality rings? >>>> >>>> I could just purchase a SLX 10 speed group for $230 and be done with >>>> it. >>>> >>>> *I heard Cook Bros came back in 2010 but with limited offerings but my >>>> search has been fruitless in terms of info regarding BCD ring sizes. >>>> >>>> So thanks in advance for any wisdom the group can dispense. >>>> >>>> ~Hugh >>>> Los Angeles, CA >>>> >>>> >>>> >>>> >>>> >>> -- >>> You received this message because you are subscribed to a topic in the >>> Google Groups "RBW Owners Bunch" group. >>> To unsubscribe from this topic, visit >>> https://groups.google.com/d/topic/rbw-owners-bunch/y1ONSgYZx54/unsubscribe >>> . >>> To unsubscribe from this group and all its topics, send an email to >>> rbw-owners-bun...@googlegroups.com. >>> To post to this group, send email to rbw-owne...@googlegroups.com. >>> Visit this group at https://groups.google.com/group/rbw-owners-bunch. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at https://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.