Hello, new to the forum and had a few questions. I recently purchased a Specialized Sirrus Sport and love it. This bike is for street and/or paved trails and I would like to get a lighter (cooler looking) wheels that will also allow me to run a narrower tire. From the research I've done I've come across the Easton EA70 700c wheelset. Basically I'd just like to know if this will work on my bike, can I still use the current rear cog gears, and what will I notice once this is installed?
Thanks

You could put 700x25 tires on those rims (are you actually thinking of using 23mm tires?) and they aren't that heavy, hubs may be.

No offence, but aren't the Easton EA70's a bit over the top compared to your relatively basic bike?
I mean: Those EA70's are nearly half of the price of your whole bike.
There are plenty of fine wheels that are way cheaper than that ... the EA50's for instance.
According to my research you bike has 28 tyres now ... you can go to 23 but it won't make a big difference.
You can use the same cassette (what you call rear cog gears), as long as you get wheels with a shimano compatible body.

The thing I love about Alex rims is that no bicycle manufacturer uses them. Oh, they have Alex rims on their bikes, just not the ones you find on the Alex web site. I assume the S500 rim is the same as one on the Alex web site but which one? Every time I look for information on the Alex rims a bike manufacturer claims to use I cannot find them at the Alex site. Quite maddening.

Anyway according to this post on Yahoo Answers you can fit 23 mm tires to your present Alex rims. There is a bit of a fad for putting 23 mm tires on wider rims than those specified by the hoary old received wisdom lately. The Velocity A23 rim is an example of this. So I would just buy new tires if I were you. I doubt that any new rims you could get are light enough or cool enough to justify the price. Save the money to buy a really light and really cool new bike if that is what you want.

Ken

Might not fit. Most hybrids use MTB dropuot spacing.

i also would not use those wheels. probably wont fit the mtb spacing on your hybrid. more importantly, those wheels cost about what your bike is worth now.

i have a sirrus sport and i put schwalbe ultremo 23mm tires on the stock alex rims...have worked great so far...definitely more speed. i am new to biking however, so i may be doing something i shouldn't be?

Yes.

More punctures, shorter tyre life, a worse ride, the joys of having to swerve suddenly into traffic to avoid even minor road blemishes - which you will have to look for religiously, poorer braking and turning grip and a bike that is a nightmare in the wet. No, the bike won't go faster - 23's work for racers as part of a complex overall package; at any wattage you are likely to sustain they won't give you a speed advantage - they'll probably slow you down. (Tyre physics is somewhat complex; if you really want to understand it then PM me and I'll send you some links.) Oh - you'll probably be faster than with the mediocre tyres most bikes are sold with, but not as fast as with the right tyres.

Oh - and you'll definitely notice that you have spent money.

If I was you then, assuming that you don't weigh more than 180lb, I'd put high quality speed oriented 28mm tyres on your bike. Sports Contacts, Marathon Racers, etc. If you're heavier then go for 32s.

The Ultremos are faster rubber than the stock tyres, but you can get the same rubber compound from Schwalbe in wider sizes (eg the 28mm Marathon Supreme). For the reasons I gave above, I wouldn't drop below 28mm for any use except racing.

However, all credit to you for having chosen one of the most sensible 23mm tyres available - at least the Ultremo has as much grip and puncture protection as a 23mm tyre can manage.

The stock S500s will fit 700x23C tires.

If you're looking to replace the wheels, any road wheelset will work. The rear spacing is 130mm on the Sirrus.

What I did with my '07 Sirrus is I replaced my wheels with something similar to this: https://cgi.ebay.com/Mavic-Open-Pro-S...ts_Accessories

The problem with the Sirrus Sport is the Joytech hubs... They blow.. More specifically the hub sealing system imparts more drag than they ought. I wouldn't replace the stock wheels for wheels that look "cool" I'd replace the wheels so the bike functions better. I'd stay at the minimum with 32 spoke wheels based on Shimano 105 or better hubs.(and yes you can re-use your rear cassette.) More spokes if I were over 180 lbs and or carrying loads.

https://www.bicyclewheelwarehouse.com...ewCat&catId=41 Heres an option and it will not cost you a arm or a leg and also you can build your wheel of choice with different hubs. 29er wheels fit perfect for hybrids with MTB rear 135mm drop outs. They also have nice colors !!! Good luck with your choice and try to take a look at this link.

Gemini, the Sirrus' rear dropouts are 130mm not 135. Yes in theory you can stretch out the stays to 135, but the Sirrus is more a road bike than mountain in the hybrid spectrum. I happen to like the following for a few dollars more: https://www.bicyclewheelwarehouse.com...d&productId=26

No! This is a not a good idea on an alu/carbon frame! These materials are not springy and flexible like steel - you'll stress them if you bend them, setting them up for a stress fracture. Mixed alu/carbon is even worse: the two materials are usually glued together and the tension could create a force at a bond in a direction it was never made to take...

What made you conclude this? If it is true I'm amazed - manufacturers have been making decent hubs for a century now... Ok: I've found a thread where someone thinks he has "proved" the Joytech seals cause drag, but he hasn't realized that

Oh I thought he had a 135 drop out thanks for the correction.To the OP check out the Performance Bike House Brand Forte Titans they have a sale for $149 for a set and they are very light weight and are very strong. I have a pair and they are smooth and its 130mm rear drop out. https://www.performancebike.com/bikes...9_20000_400038

That's why I said "in theory" in practice I wouldn't do it and if you look at the wheels I suggested they are based on 130mm hubs.

As for the Joytech hubs.... personal 1st hand experience.

Yes, but what test did you do that makes you think that they are slow for this reason? As the link I provided indicates, a lot of people are mislead on this if they spin the wheels by hand - and I doubt that you rode without seals.

Side by side comparison to a set of wheels based on Shimano Ultegra Hubs. You can FEEL the rubber seals dragging on the Joytech rear hub. Secondly, performance. The bike is a full 3 mph faster on the Ultegra hubs compared to the OEM joytechs.

I talked to my local bike shop and he agreed with most of you. So I will eventually be getting a set of Easton EA50's. The EA70's were a little overkill. I still want to use a 700X23 tire with some sort of water tread and not just a slick style tire as well as a lighter weight rear cassette.

Then your Joytechs weren't maintained properly or you had got bad ones from the factory: the total possible inefficiencies in a correctly modern bicycle powertrain aren't enough to account for a 3mph difference.

Thinking the forte titans now, any opinions? Also new lighter rear cassette ideas?

When I got my racewheelset i ended up buying an ultegra 11-23 cassette 6500 for it that was about 47€, which i feel is a great price to quality ratio. You could spend half of that by getting a tiagra though ... or choose something inbetween and get a 105, but they are harder to find in 9-speed i think.
If you are not very fit and/or have very steep hills in your area, you may want to get something with lighter gears, like a 12-27 or similar.

Well I found a sweet deal on the Easton EA50's, I'm so excited! now I just need a new lighter rear cassette and some nice fast tires.