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1989Pre 03-08-11 10:32 AM

Open Pro Questions
 
Hi. I need to replace my rear rim (Sun CR18) and was suggested by my LBS to go with the Mavic Open Sport. I went over to the Mavic site and I see that the Open Pro is a much better rim, though. the Mavic website failed to answer my questions, though and I
was wondering if someone here can:
1.) Is there a 36H(touring) rim that is a step up from the quality of the Open Sport and not as expensive as the Open Pro? 2.) Does the Open Pro come in 36H?
Which other 36H rims should I ask about at my LBS?
A Specialized, sealed hub is going on the new wheel.


Paul

positron 03-08-11 10:39 AM

Open pro and open sport are equally strong, the OP is lighter and therefore more expensive.

for a touring bikke, use the OS, or the mavic a719, depending on the size tire you run. there is basically no difference between OS and OP other than price, machining and weight. strength is the same.

positron 03-08-11 10:40 AM

PS, a velocity synergy offset-rear 700c rim would be a better choice than mavic for a strong rear wheel.

look into it. great rims.

tarwheel 03-08-11 11:18 AM

Velocity Dyad rims would be stronger and less expensive than OPs and available in 32 and 36 H, but they are heavier. Velocity Synergys weigh about the same as Dyads. I chose Dyads because they have a machined braking surface in silver, but the Synergys do not -- altho they do in black. Not sure why they are not made consistently.

Mavic CXP 33s are stronger than OPs but weigh about the same as Velocity Dyads and cost the same or more than OPs.

For touring, I concluded that V. Dyads offered the best compromise between cost, weight and durability. My touring/commuting wheels were made with 36H Dyad rims, Ultegra hubs, DT butted spokes, brass nipples and cost about $350 for the set hand-built.

I've got 32H Ultegra/Open Pro wheels on three other bikes. They are great wheels and noticeably lighter than the 32H Dyads, but not as bulletproof. Open Pros are available in 36H but harder to find. If you are going to be using the wheels for loaded touring, I would recommend the Dyads over OPs. Dyads will also accept larger tires.

positron 03-08-11 11:50 AM

Dyads are much wider than OP, or OS. Heavier as well. not a problem, but again will depend on your tire size. OP/OS and synergy are more similar and better for smaller tires. they are all lighter. Dyads, are the heaviest and more similar to the a719's. better for 32mm and up tires.

just more info.

fietsbob 03-08-11 12:06 PM

Given we are talking Touring, consider:
http://www.mavic.com/en/product/rims...lon/rims/A-719

seeker333 03-08-11 12:49 PM


Originally Posted by positron (Post 12330445)
PS, a velocity synergy offset-rear 700c rim would be a better choice than mavic for a strong rear wheel...

+1

I'd definitely be looking for an asymmetrically-drilled rim, especially if it's for building a 130mm spaced rear wheel.

For a 700c, I think I'd go with the Aerohead OC instead. These have been available for a couple years now. QBP shops sell these for ~$50, although they presently appear to be out of the highest sought after version, the 36h.

http://www.velocityusa.com/default.asp?contentID=582

OP - you'll need new spokes to go from a Sun CR18 to almost any other rim. Sticking with what you have is the least expensive alternative.

http://aebike.com/product/sun-cr-18-...m8491-qc30.htm

Peter White may have the Aerohead OC for $67.

http://www.peterwhitecycles.com/velocity.asp

I have several Synergy OC rims built into 26" rear wheels, also used one to build a front disc wheel.

tarwheel 03-08-11 02:52 PM

Actual rim weights each according to mfgs:

- Mavic Open Pro, 435 grams
- Mavic Open Pro Sport, 490 g
- Mavic CXP 33, 470 g
- Mavic A719, 565 g

- Velocity Dyad, 480 g
- Velocity Synergy (OC), 490 g
- Velocity Aerohead (OC), 418 g
- Velocity Deep V, 520 g

Barrettscv 03-08-11 03:08 PM

I'm using a 36 hole Open Pro on my commuter. The wheel is strong and light, but not ideal for touring.

Problem number one is width, I would not run a tire larger than a 700x28 with a 19mm wide rim. (I know people do this, but Mavic does not recommend larger than 28, and I would not either).

Second: a stronger rim like the Dyad is a better value, price wise.

How heavy are you and how much weight do you load on your bike?

positron 03-08-11 04:04 PM

Hey tarwheel, I have seen those weights, but im pretty sure the dyad weight quote is a mistake. It is definitely heavier than the synergy (im holding one of each right now in 650B size. Im pretty sure it should be listed at 580 gms....

having used all four of these rims, I would say that for heavier riders, the dyad a-719 is the choice.

for lighter riders, synergy is great. and open sport is similar to synergy in size and durability.

FWIW, all of these rims build easily into a true and round wheel... they are all very good.

my 2p

furballi 03-08-11 08:21 PM

If you want durability, then go with Velocity deep V (about $40-$50 if you shop around). Otherwise, CR18 is a very good rim. No need to spend the extra $ on Open Pro (LBS wants to make more $). Open Pro can't touch Deep V when it comes to strength. If you don't like the look of Deep V, then go with the more affordable Velocity Aero...a perfect blend of performance and value. I run Aero with Shimano 600 32H hubs.

lubers 03-08-11 08:37 PM

I took this off Bicycle Wheel Warehouse for the Open Pro, I run 700x32 on my commuter with no problems, and I go 275 and add another 20lbs in my bags when I commute:

Hubs: Shimano Ultegra 6700® series, 8/9/10 speed compatible, 32 hole, silver gray

Spokes: DT Swiss silver or black double butted Competition®, 2.0/1.8/2.0 (please select)

Nipples: DT Swiss brass or alloy nipples (please select)

Weight w/ alloy nipples (approx.): Front = 822g, rear cassette = 1030g, Set = 1852g

Weight w/ brass nipples (approx.): Front = 842g, rear cassette = 1050g, Set = 1892g

Valve Type: Presta

Tire Sizes: 700 x 20 - 700 x 32

1989Pre 03-09-11 10:05 AM

Hi Barret, I am 160 pounds soaking wet and only plan on credit card touring for my first tour (Boston, MA. to Lexington, KY). I've been reading the posts and it seems I will go with the Open Pros since I am using 700X23 tires.


Originally Posted by Barrettscv (Post 12331820)
I'm using a 36 hole Open Pro on my commuter. The wheel is strong and light, but not ideal for touring.

Problem number one is width, I would not run a tire larger than a 700x28 with a 19mm wide rim. (I know people do this, but Mavic does not recommend larger than 28, and I would not either).

Second: a stronger rim like the Dyad is a better value, price wise.

How heavy are you and how much weight do you load on your bike?


Barrettscv 03-09-11 11:50 AM


Originally Posted by 1989Pre (Post 12335285)
Hi Barret, I am 160 pounds soaking wet and only plan on credit card touring for my first tour (Boston, MA. to Lexington, KY). I've been reading the posts and it seems I will go with the Open Pros since I am using 700X23 tires.

Yes, that should work. I have 8000 miles on my 32 spoke Open Pro/Shimano 105 wheelset. I'm between 210 and 220 lbs and sometimes will add a 25 lbs load to the 24 lbs bike. FYI, I use 700x25 tires at 90-110 psi.

The wheels have been flawless. no issues, but I did retension the spokes as a precaution at 700 miles.

Michael

Post Script: I'm having a Velocity A23/Shimano 105 wheelset made for my Cyclocross bike. I'm really happy to find a 23mm wide rim that should perform like the Open Pro. I'll use 700x25 sized tires but could install up to 700x35 if I wanted.


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