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New bike (maybe).

Old 05-10-15, 07:37 AM
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Retro Grouch 
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New bike (maybe).

I'm thinking about replacing my Rans Enduro Sport 20/26 with a Rans Rocket 20/20. I'm hoping the more compact rocket will fit inside my car more easily. I'm doubting I'll miss the speed advantages of the 26" rear wheel format. I've found a rocket for sale, but I'm not yet sure which version it is. I know that I'd prefer the round tube version. Gearing might become an issue. I want to keep my 148 mm crankset and I'm not sure if I'll be able to find reasonably priced larger than common sized chainrings that will fit it. If my math's right I'll need a 60 tooth chainring to get to my goal of 100 gear inches. A 54 chainring will give me 90 gear inches which I think I could be satisfied with.
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Old 05-10-15, 09:07 AM
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I think Rockets used to come standard with a 60 or 62 toother in front. 39-52/62 sticks in my mind. Of course, they were longer cranks than what you want - but they may move over if you're lucky.
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Old 05-10-15, 12:32 PM
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Get ready for some sticker shock. Anything beyond 53 teeth gets really pricey. The last time I looked at a replacement 65 tooth 130bcd chainring for my Schlumpf drive at the Hostel Shoppe it cost $170.
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Old 05-10-15, 12:34 PM
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Originally Posted by BlazingPedals View Post
I think Rockets used to come standard with a 60 or 62 toother in front. 39-52/62 sticks in my mind. Of course, they were longer cranks than what you want - but they may move over if you're lucky.
I think that you're right. I just received photos and I counted 15 teeth in about 1/4 of the big chainring. I also just checked my existing creankset and discovered it has a 130 mm BCD so the macho rocket chainrings will transfer over to my 148 mm crankarms.

Assuming the sale goes through I think that I'll relace my King rear hub onto a 20" rim and maybe even install a set of Magura rim brakes that I've got in my shop.
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Old 05-10-15, 12:36 PM
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Originally Posted by VegasTriker View Post
Get ready for some sticker shock. Anything beyond 53 teeth gets really pricey. The last time I looked at a replacement 65 tooth 130bcd chainring for my Schlumpf drive at the Hostel Shoppe it cost $170.

I found a NIB 54 tooth carbon chainring on Ebay this morning for $64.00. I'm glad that I didn't buy it now.
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