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borgey007

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Reply with quote  #1 

I am awaiting a Specialized Diverge Expert 2018. The stock wheels are 700C, with 38mm tires.

I want to replace the wheels with 650B alloy wheels, so that I can put on fatter tires (47mm) to increase stability (the new Diverge can accept 650B wheels and fatter tires).

My choice of wheels are:
I.
Boyd Jocassee Gravel 650B, with rim specs:
24mm internal diameter
36mm deep

II.
Easton EA70AX DISC 650B, with rim specs:
24mm internal diameter
20mm deep

III.
Ardennes Plus LT Disc Brake 650b, with rim specs:
21mm internal diameter
24.5 mm deep

My preference I think would be the Boyd Jocassee, because those wheels (like Easton) has the wider internal rims; and I've read a wider internal rim makes a better fit for wider tires (47mm).

The Ardennes Plus LT Disc Brake looks good, but its internal rim diameter is only 21mm.

I am hesitating to finally go with the Boyd Jocassee because of its rim depth of 36mm.

Will my bike be less stable (due to crosswinds) on the Boyd Jocassee wheels, compared to the Easton EA70AX, whose rim depth is only 20mm deep?

I could just buy the Easton EA70AX wheels, which also has the wider internal rim diameter of 24mm.
But I've read about quality issues with Easton wheels; but I don't know if these are true or not.

Thanks for all opinions!

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Volsung

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Reply with quote  #2 
Aero's more necessary on the road when you're going faster.  If you're fast on gravel (I'm not) then aero might be good.  Personally I like comfort and light weight, so I'd lean towards the Eastons.

I had some Easton road wheels.  They weren't sealed at all and got all grindy after getting caught in the rain.  I've heard they improved since then (this was like 2012), but I always go custom.


White Industries to Nextie Premiums for me.
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Z. Fechten

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Reply with quote  #3 
My understanding is rim shape is more important than depth. Rounded rim cross sections cause less turbulence than rectangular or sharp V shapes, making them less susceptible to cross winds. The Boyd looks pretty rounded.
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oleritter

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Reply with quote  #4 
Quote:
Originally Posted by borgey007

I am awaiting a Specialized Diverge Expert 2018. The stock wheels are 700C, with 38mm tires.

I want to replace the wheels with 650B alloy wheels, so that I can put on fatter tires (47mm) to increase stability (the new Diverge can accept 650B wheels and fatter tires).

My choice of wheels are:
I.
Boyd Jocassee Gravel 650B, with rim specs:
24mm internal diameter
36mm deep

II.
Easton EA70AX DISC 650B, with rim specs:
24mm internal diameter
20mm deep

III.
Ardennes Plus LT Disc Brake 650b, with rim specs:
21mm internal diameter
24.5 mm deep

My preference I think would be the Boyd Jocassee, because those wheels (like Easton) has the wider internal rims; and I've read a wider internal rim makes a better fit for wider tires (47mm).

The Ardennes Plus LT Disc Brake looks good, but its internal rim diameter is only 21mm.

I am hesitating to finally go with the Boyd Jocassee because of its rim depth of 36mm.

Will my bike be less stable (due to crosswinds) on the Boyd Jocassee wheels, compared to the Easton EA70AX, whose rim depth is only 20mm deep?

I could just buy the Easton EA70AX wheels, which also has the wider internal rim diameter of 24mm.
But I've read about quality issues with Easton wheels; but I don't know if these are true or not.

Thanks for all opinions!

  

Those Boyd wheels look really cool.  Pretty spendy, though.  And I'm thinking the rim must be carbon.

36mm is not super deep, but as someone has stated, it's also the rim shape and not just the depth.  But, I would say, yes, you might notice a bit more in crosswinds than other wheels.  Enough to matter?  Not sure, that probably depends on you mostly.  

I think the 24mm internal width is not completely necessary, and you could go narrower, but it should work well with a 47mm tire.  

Have you considered a custom built set?  

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owly

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Posts: 92
Reply with quote  #5 
Never had Easton wheels, but I have come across a few quality complaints with their builds.

You'd be fine on the 21mm Inner-width. I'm running a 2.1" on a 20mm Inner (XR331) and its fine.

If considering a 24mm Inner, I'd triple-check the clearance (online forums? e.g. GoogleGroups: 650b), running a 47mm, as that Inner-width will spread the tire out, increasing its width at the chainstay.

36mm deep on 27.5, imo would look a bit weird.

Personally, I'd go the Ardennes, from your list.
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Gannon311

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Reply with quote  #6 
I have the sport model of that bike , which is the same frame. I can't run the suggested max tire size on the 700c wheels so just keep that in the back of your mind. :/. I'm running 38 triggers tubeless and also looking for wheels ..... the stock axis must have several bricks in the them [frown]. I'm looking at...
Crest mk3
DT Rr411
Iron cross
Grail
Crest are the lightest and widest but don't know about aero , or do I even need to worry about aero???
I have a set of them on my mtb laced to hope pro 4s and love them. Leaning towards that for the gravel bike also.
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oleritter

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Posts: 202
Reply with quote  #7 
Quote:
Originally Posted by Gannon311
I have the sport model of that bike , which is the same frame. I can't run the suggested max tire size on the 700c wheels so just keep that in the back of your mind. :/. I'm running 38 triggers tubeless and also looking for wheels ..... the stock axis must have several bricks in the them [frown]. I'm looking at... Crest mk3 DT Rr411 Iron cross Grail Crest are the lightest and widest but don't know about aero , or do I even need to worry about aero??? I have a set of them on my mtb laced to hope pro 4s and love them. Leaning towards that for the gravel bike also.


I don't think any of those come in 650b except the Crests.  Crests are nice if you are light and/or not hard on wheels.  

I've got a great rim with 23mm internal that could be built up with different hubs, depending on your budget.  

TL23-2.jpg  These would work great with the 47c tires.



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Gannon311

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Reply with quote  #8 
Quote:
Originally Posted by oleritter


I don't think any of those come in 650b except the Crests.  Crests are nice if you are light and/or not hard on wheels.  

I've got a great rim with 23mm internal that could be built up with different hubs, depending on your budget.  

TL23-2.jpg  These would work great with the 47c tires.

[/QUOTE
Yeah I was just piggybacking a little bit. You are correct on those sizes.
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Gannon311

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Reply with quote  #9 
What hoops are you suggesting ?
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oleritter

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Posts: 202
Reply with quote  #10 
Quote:
Originally Posted by Gannon311
What hoops are you suggesting ?


That rim is a Kinlin TL-23.  It is much like a WTB KOM I23.  

About 425g in 27.5" size.

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