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Bike-specific Questions!

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To convert my Stumpjumper....

Hi, Everyone. I have been considering converting my 2010 Specialized Stumpjumper to an ebike. Did a lot of mountain biking in my younger days. (65 now) and don't use it as much. It is in really good shape and had about $400 worth of replacement maintenance a few years back. It was about $3000 new.

I have a Specialized hybrid which I ride a lot and don't really want to change it.

The stumpy would be used as a commuter, doing some gravel roads and in particular, going up to retrieve my truck after I paraglide. Some of our retrieves are 4-7 km long with elevation gains of 600-1200 meters.

I'd like lots of top speed and a moderate amount of distance from the bike. I've just been introduced to this site in some youtube videos and speeds of over 50 km/hr look very appealing.


I'm curious about doing the conversion myself or just having Johnny do it. I have mechanical experience but if the cost is reasonable, I'd rather haver the warranty and support.

I'm interested in what I might pay either way. Your thoughts on the suitability of this bike to convert. Any other ideas?

How about total weight of a conversion.

I'm trying to add some photos but nothing happens when I click the various buttons. What gives?

I'll try this


https://photos.app.goo.gl/GhrsZzis3bpmx7AU8



187 Views
1fitz
1fitz
Jan 01, 2023

gotcha. currently if you can get your hands on a CYC photon motor, its the better of the current mid drive motor options - for 110Nm torque and about 4kg/ 8.8lbs for the motor and accessories, pair a good battery with it, 52v 15Ah or something, and it should be good. i saw a recent golden motor video on the photon motor its pretty informative, and its surpassing bafang and tongsheng motors currently in terms of torque to weight ratio, ease of install, etc.

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