Convert the ering & hub from Quest to Sofrider

[Greg Forknall]

Looking for any feed back on

Looking for any feed back on NuVinci N360 CVP hub ?

http://www.bicyclestore.com.au/nuvinci-n360-cvp-speed-hub.html

and

http://www.fallbrooktech.com/sites/default/files/videos/N360_RMF_EN.pdf

With hopefully original 34t chainring and 16t sprocket I'll get 2.2 to 7.9 ratio completely variable between hi/lo

Original Sofrider is 2.2 to 9.0 but I rarely use 7/8th (7.6&9.0) gears (down hill coasting), mainly use 3/4/5 in hi, on a good night 6th (6.6) for short periods.

Thks Greg

 

[Vargas]

Which tire: 1.00, 1.25 or 1.50?

I am just using this thread since there is some problems with new messages.

I came to the conclusion I ride much more on asphalt than unpaved roads.
I have a pair of Kenda Small Block Eight 26X1.95 on the bike and will use them when I expect to ride on unpaved roads.
But for everyday (and maybe a future 200 Km brevet) use I'll go for a Maxxis Detonator 100 psi.
Which would be the best size, 26 X 1.00, 1.25 or 1.50?
I am thinking on the 1.25, but would the 1.00 be a better option for speed?
I'd like to hear some thoughts on pros and cons of 1.25 against 1.00. That would help me a lot!

 

[Eric Winn]

26x1.0 Tires

I have hit over 32+ mph (51+ kph) on a Cruzbike Quest with 26 x 1.00 tires but handling gets pretty squirrelly riding those tires on gravel, mud, snow and other non-pristine surfaces.

-Eric

 

[Vargas]

This is why i'll keep the 1.95

Hi Eric,
This is why i'll keep the 1.95 and use them when going to unpaved roads/trails.
Would the 1.25 provide a better handling? I suppose so, but how better?

 

[Charles.Plager]

If the 1.25 can take the same

If the 1.25 can take the same pressure as the 1, the wider tire will have LOWER rolling resistance (but higher wind resistance). I've found wider tires do much better on loose gravel or uneven surfaces and will allow you to run lower pressure if necessary.

What are the maximum pressures you can run on the three tires (and how much do you weigh - consider this but you don't have to answer)?

 

[Vargas]

The three will take a 100

The three will take a 100 psi.
This is really new information to me. I thought that given the same rim size, pressure and tire pattern, the smaller one would have lower rolling resistance, being this the reason why road bikes have so thin tires.
Then in case the 1.25 has lower rolling resistance than the 1.00, I will go for the 1.25.
Btw I weight 78 kg.

 

[Charles.Plager]

If you do ride off the road

If you do ride off the road ( e.g., on trails) then the 1.5 isn't a crazy choice either. If you pump that puppy up-to 100 PSI like the others, it should roll even better than the other two.

Tire weight doesn't matter as much as many people think. For climbing, it is identical to extra weight anywhere on your bike (or your tummy, for that matter). For acceleration, the tire/wheel weight matters twice as much, but you're still talking about hundreds of grams compared to a total (bike/rider) weight of around 100 kg.

In pro racing, apparently a lot of riders are moving from 23mm to 25 mm for these reasons. And for the pros, air resistance is very important. For shmoes like us, it doesn't make sense to go too skinny.

 

[Vargas]

Thanks a lot.
This was very

Thanks a lot.
This was very helpful information. I had no idea about the inverse relation of rolling resistance and tire diameter.
I checked it better and realized I made a mistake; the 1.50 takes 80 psi.
So the choices are 1.25 100 psi or 1.50 80 psi. Which would you take?

I agree 100% with you on weight. A couple of 100 grams won't make much difference in 100 Kg.

 

[Charles.Plager]

I have the stock 100 psi 1.25

I have the stock 100 psi 1.25 Maxxis Detonators (can I just say that this company has the dumbest names I've ever seen for tires) on my Sofrider and for roads, I like them just fine (the tire, not the name ). If I rode on dirt or limestone, I'd give serious thought to 1.5" tires.

Cheers, Charles

p.s. What I said for tire width is true for tire diameter as well. 700c tires (for a given width, material, and pressure) have slightly less rolling resistance than 26" tires which have less than 20" tires.

Also note that when you aren't riding on perfectly smooth surfaces, high pressure tires can have more rolling resistance because they aren't rolling along, they are skipping along. Suspension does help this, but it is worth playing with what air pressure you put in your tires for the roads on which you actually ride.

 

[John Tolhurst]

I go with the 100 psi and

I go with the 100 psi and 1.25 with suspended bikes. They spin up to speed easier and are a lot more zippy than 1.5 at 80 psi, in my experience at least.

 

[Vargas]

Thanks to all!
Will order the

Thanks to all!
Will order the 100 psi 1.25.

 

[Greg Forknall]

NuVinci N360 hub, new

NuVinci N360 hub, new rim/spokes on order be a week or two.

Than try to fit it all up, and work out what length chain I'll need, or chain tensioner not sure if there will be enough slack to remove the wheel without a tensioner.

Going to use the original 34t chainring and either 17t sprocket to give me 2.1-7.4 or 16t for 2.2-7.9.

Greg

 

[GregFork]

Well still waiting ... first

Well still waiting ... first hold up the hub had 18 spoke hole one side but got to late in the day and they only managed 14 holes on the other side ... delayed wait for replacement ...

Hub fitted all good ... picked it up, strip sofrider ready to fit the new wheel, wrong hub they fitted the early model, returned the next day ... please try again ... long weekend so lost Monday (Perth) to order it (I did ask him to order it on Monday and we would have it Tuesday didn't happen) turned up Wednesday called them at 1pm (they should have rang me first) can't finish it need to order new spokes ! (the N360 hub has smaller diameter than the earlier unit) back to waitiing again ... maybe today.

Greg

 

[Charles.Plager]

Hi Greg,
Sounds very

Hi Greg,

Sounds very promising! And, remember, if you finish but don't post pictures, you never really finished.

Cheers,
Charles

 

[Eric Winn]

Like Charles said...
I've

Like Charles said...

I've been curious about the NuVinci so I'm anxious to see how you make out with it. Fthills seems to really like his Rohloff powered Vendetta. Maybe you two will start a trend ;-)

-Eric

 

[GregFork]

Finally ready ! ... pick it

Finally ready ! ... pick it up tonight after work see how easy it is to fit up & what I've missing that will catch me out ...

Shopping list so far ...

1 x NuVinci N360 hub (hub, twist grip shifter, 2 x inner cables, axle nuts and lock washers
2 x 1200mm long outer cables (hope there long enough)
5 x Chainring screws and nuts (no short ones @ the bike shop so I'll grind mine down myself or leave the 48t ring on for now)
1 x Chain tensioner
1 x Chain
1 x Set spokes
1 x Rim (wanted to keep the original setup as spare or if I change bikes down to track)

(can't understand why they don't supply the outer cables with the hub)

Greg

 

[Charles.Plager]

Since we've already demanded

Since we've already demanded pictures, why don't you take some as you're putting it together...

 

[GregFork]

I did have inventions of pics

I did have inventions of pics as I go but the excitement of finally doing it got to me and went full speed into getting it together. But once again feel in a hole, they supplied the wrong chain (1/8 instead of 3/32) and the link was jamming in the tensioner wheel and the tensioner need extra washers to align with the sprocket, Back to the shop we go. They gave me a 8 speed chain and I added some spacers to get the tensioner aligned (to be revisited to a different setup later). Finally together but the chain is riding up on the sprocket, there chasing done the 3/32 chain, but I did get a ride in I had to go easy on the pedals to much push and the chain skipped, but I really love this hub always in the right ratio smooth as butter really light to operate the twist grip just push with your thump and it just gets easier to pedal, I tried a stop in the highest gear then twist the grip and it goes about a quarter of a turn then stops you than gently turn the pedal a half a turn as you continue to twist the shifter and your in low in that half a turn brilliant. Waiting for a call to see if they got the other chain... fingers crossed it fixes it.

 

[John Tolhurst]

Well done Greg, 
Looks like

Well done Greg,

Looks like you are finally there. Very instructive thread for others with similar desires. Thanks very much.

 

[Eric Winn]

Nuvinci video

To see how it works: