HSPalm Posted August 25, 2021 Report Share Posted August 25, 2021 Hi, I would like to know if it's possible to add a second rear sprocket on the Inspired Fourplay Pro 2020. I don't need a shifter, I am fine with manually placing the chain with my hands since I will use it so seldom and also to keep complexity and weight down. The idea of course is to have a higher gear ratio for the longer stretches between riding spots. Thanks Quote Link to comment Share on other sites More sharing options...
HSPalm Posted August 25, 2021 Author Report Share Posted August 25, 2021 Don't need a derailleur either, I guess. Quote Link to comment Share on other sites More sharing options...
HSPalm Posted August 25, 2021 Author Report Share Posted August 25, 2021 When I think about it, the extra sprocket would need to be in front, because there's no room for a smaller sprocket on the rear hub. Or else I would have to change the chain ring for a much larger one to compensate. Maybe If I can replace the bash guard with a larger sprocket, actually just use a larger sprocket as bash gard. Sounds a bit dangerous maybe to have a spiked bash guard. Quote Link to comment Share on other sites More sharing options...
Matt24. Posted August 25, 2021 Report Share Posted August 25, 2021 Probably less dangerous more that it’ll just bend on first decent impact and be useless. What do you want the extra gear for? I did many years back run second cogs for getting about but that was when bikes still had mech hangers to just pop it across. I think you’ll find it difficult on something purpose built for a single trials gear. Quote Link to comment Share on other sites More sharing options...
HSPalm Posted August 25, 2021 Author Report Share Posted August 25, 2021 Yes same purpose as you used it for. I can see it's problematic hitting it all the time. Quote Link to comment Share on other sites More sharing options...
Matt24. Posted August 25, 2021 Report Share Posted August 25, 2021 Ok - for you to make meaningful difference you’ll either need a pretty small rear or pretty big front. Neither of which are going to work that well as there isn’t a simple chain alignment method with an integrated tensioner. From experience I’d not bother and just focus on pedalling faster! Quote Link to comment Share on other sites More sharing options...
HSPalm Posted August 25, 2021 Author Report Share Posted August 25, 2021 Valid points for sure! Especially about the tensioner since I wouldn't be using a derailleur. The stock tensioner does have som play, maybe if I positioned it in the middle... No okay I'll leave this one I think... Quote Link to comment Share on other sites More sharing options...
Matt24. Posted August 25, 2021 Report Share Posted August 25, 2021 Yeah there is some play but what I found was the smallest cog I could use on the rear setup just didn’t offer enough benefit for the faff! 1 Quote Link to comment Share on other sites More sharing options...
robkerly Posted September 1, 2021 Report Share Posted September 1, 2021 i mucked about with this idea on my old zebdi. ended up with a 2x front set up, with a half bash ring and a fairly chinesium tensioner. chain slap is obviously more than on a singlespeed tenioner setup as it needs more chain. a better tensioner would probably help a lot. i also fabricobbled a front chain device, mostly because a dcd wont fit the square chainstays. hope the pictures help if anybody wants to try it. Quote Link to comment Share on other sites More sharing options...
cwtrials Posted September 2, 2021 Report Share Posted September 2, 2021 (edited) It was pretty doable on old school bikes with a regular hanger and a cassette hub. I used to have a setup with a road derailleur on my old zebdi that was pretty easy to switch gears between for longer stretches. might be a lot more difficult on a fourplay and would lose a lot of the advantages of modern tensioning systems. adding a gear on the rear would mean switching out the hub and you'd have trouble having both gears align with the in built tensioner. adding a gear on the front would most likely make clearance issues on the chainstay. I think it's possible with a cassette hub, to add a 2nd lower gear in the rear, you'd have to readjust the tensioner every time to make it work. Would probably be a pain to make work well and take some time to switch between. IMO not worth it. Edited September 2, 2021 by cwtrials Quote Link to comment Share on other sites More sharing options...
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