Author Topic: Rim advice - dynamo build  (Read 3160 times)

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Offline bnolan@yahoo.com

Rim advice - dynamo build
« on: February 08, 2017, 12:25:27 am »

I have just purchased a Shutter Precision PD-8 dynamo hub.  My plan was to re-use my existing rim for the build, but now am wondering if I should use a wider rim.

My 2016 Novara Safari came with Vittoria Randonneur 700x48c tires on Alexrims MD19 rims.   I like the wide tires given the quality of the roads and paths I regularly ride on.   A 19mm rim seems a little bit narrow for a 48c tire.  Should I be looking for something wider?  Recommendations?

Offline Pat Lamb

Re: Rim advice - dynamo build
« Reply #1 on: February 08, 2017, 09:45:08 am »
Have you had any problems with your current setup? 

Dynamo hubs are just a different hub.  I wouldn't change anything just for that.  You might want to replace the rim if it's worn, or if you want an extra front wheel.

Offline DaveB

Re: Rim advice - dynamo build
« Reply #2 on: February 09, 2017, 08:24:04 am »
Are you planning to go to even wider tires?  Will your frame and fork even clear a wider tire?  If no to either question and your bike came OEM with those rims and tires, apparently the manufacturer was convinced the rims were wide enough.

Offline RonK

Re: Rim advice - dynamo build
« Reply #3 on: February 09, 2017, 03:20:55 pm »
Regardless of whether the rim is wide enough, it makes sense to build a complete new wheel and keep the original as a spare.

And in fact with 48mm tires you should be using 25mm rims.
Cycle touring blog and tour journals: whispering wheels...

Offline bnolan@yahoo.com

Re: Rim advice - dynamo build
« Reply #4 on: February 09, 2017, 09:38:35 pm »
Thanks.   I had heard a rule of thumb that the rim should be 50-65℅ the width of the tire.

Offline canalligators

Re: Rim advice - dynamo build
« Reply #5 on: February 10, 2017, 08:23:06 am »
Tire and rim width guide:
http://www.sheldonbrown.com/rim-sizing.html

For touring use, where reliability is very important, I would always build with new spokes, and likely a new rim too.  I also build with tried & true, conservative spoking, and the result is that I never have wheel problems.  I will occasionally reuse rims when they're in top shape (low mileage) and the bike is only used for local riding. 
« Last Edit: February 10, 2017, 08:27:05 am by canalligators »