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Old 02-08-15, 06:27 PM
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Question for 2014 Specialized Sirrus Expert Disc Carbon owners

Have any of you that own this bike swapped out the tires to anything larger than the 25mm one's the bike comes with stock? I was wondering if the bike would accept a 32mm or if not at least a 28mm.

Thanks!
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Old 02-09-15, 12:33 AM
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Hi, here is a pic of the front with a 28 Tire. The guy at the shop says a 32 will not fit in the front. I think it just might but I think just barely and I mean barely.

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Old 02-09-15, 12:35 AM
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Thanks for the response. I'm guessing the 28 fits on the rear as well? Just curious, what tires are they?
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Old 02-09-15, 12:36 AM
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Here is a pic of the rear with a 25.
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Old 02-09-15, 12:36 AM
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Originally Posted by Monstermash
Thanks for the response. I'm guessing the 28 fits on the rear as well? Just curious, what tires are they?
Those are Specialized Roubaix Pro in size 25/28.
https://www.specialized.com/us/en/ftb/road-tires/endurance-road-tires/roubaix-pro



Last edited by 2702; 02-09-15 at 12:40 AM.
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Old 02-09-15, 12:40 AM
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Do they measure 28mm when mounted or somewhere in between 25 and 28?
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Old 02-09-15, 12:41 AM
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They were just put on today and did not measure them. I have 28 Gatorskins on my other bike and these Roubaix tires are bigger width wise. Contis run small.
Eyeballing the front I now think there is no way a 32 will fit there. Rear should be close though.
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Old 02-09-15, 12:44 AM
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Originally Posted by 2702
My bike needs a wash! Are you going to get a used 14 Sirrus Expert?
No, there are a few dealers in my area with leftovers in stock. They have them discounted so I think I might pick one up.
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Old 02-09-15, 12:47 AM
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Originally Posted by Monstermash
No, there are a few dealers in my area with leftovers in stock. They have them discounted so I think I might pick one up.
Wow! I would pick one up fast. I get a lot of compliments on the looks of this bike.
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Old 02-09-15, 12:49 AM
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It's a very good looking bike for sure!
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Old 02-09-15, 08:24 AM
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Nothing wrong with fitting a 35 on the back, and a 28 on the front. You will gain quite a bit of comfort with a bigger tire on the rear.
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Old 02-11-15, 06:45 AM
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Originally Posted by 2702
Hi, here is a pic of the front with a 28 Tire. The guy at the shop says a 32 will not fit in the front. I think it just might but I think just barely and I mean barely.

Are you running the stock wheels? If so, do you know what the internal diameter of he rim is? Also, any chance you know how much the stock wheelset weighs?
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Old 02-11-15, 10:22 AM
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Originally Posted by Monstermash
Are you running the stock wheels? If so, do you know what the internal diameter of he rim is? Also, any chance you know how much the stock wheelset weighs?
I am running stock wheels, never weighed the stock wheels. Buying aftermarket wheels is probably the best upgrade for the bike I think.
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Old 02-11-15, 10:33 AM
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Originally Posted by 2702
I am running stock wheels, never weighed the stock wheels. Buying aftermarket wheels is probably the best upgrade for the bike I think.
The wheels are my first planned upgrade. ANy idea what the bike weighs stock?
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Old 02-11-15, 10:36 AM
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My medium is about 21.xx pounds as I recall. The stock wheels are not light, just look very nice. One look at nice aftermarket wheels and its about half the price of the bike so never got into that stuff. Now nice tires that's more my game.
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Old 02-11-15, 11:44 AM
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Originally Posted by 2702
My medium is about 21.xx pounds as I recall. The stock wheels are not light, just look very nice. One look at nice aftermarket wheels and its about half the price of the bike so never got into that stuff. Now nice tires that's more my game.
21+ Lbs for a carbon framed bike is a bit heavy. I'll bet adding a nice set of aftermarket wheels would drop it into the 19 lb range. I'll be changing out the wheels, tires, crank, and a few other parts and I'll be sure to weigh the bike before and after. I'll bet the stock wheels are close to 2200 grams. These wheels should make a difference, no?

https://www.mavic.us/wheels-mtb-crossmax-sl

Last edited by Monstermash; 02-11-15 at 12:17 PM.
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Old 02-11-15, 12:15 PM
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Originally Posted by Monstermash
21+ Lbs for a carbon framed bike is a bit heavy. I'll be a nice set of aftermarket wheels would drop it into the 19 lb range. I'll be changing out the wheels, tires, crank, and a few other parts and I'll be sure to weigh the bike before and after. I'll be the stock wheels are close to 2200 grams. These wheels should make a difference, no?

Crossmax SL | Mavic - United States
Never had a chance to ride with 1k aftermarket wheels. Is that for one or two wheels?
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Old 02-11-15, 12:19 PM
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Originally Posted by 2702
Never had a chance to ride with 1k aftermarket wheels. Is that for one or two wheels?
That's for the pair.
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Old 02-11-15, 01:53 PM
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Last night I tried a 30/32 Roubaix Pro Tire in the back for comfort. I did not like this combination. Robbed the fun out of it for me, felt so sluggish. So I exchanged it for a 25mm Conti 4000S GP. Restored the " spirit" of the bike back. Different tire combination/sizes work for different bikes.
Still have the 25/28 in the front and works terrific there, for the traction.

Last edited by 2702; 02-11-15 at 02:37 PM.
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Old 02-11-15, 02:08 PM
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I have a set of Schwalbe Ultremo ZX in size 28mm I'm going to try on the bike with the new wheels. I tried using them on another set of rims with a 23mm ID but they were not compatible. I'm really hoping they work. If not, then I will go to the Michelin Pro 4 Service Course in 26mm or the Roubaix 25/28.

Originally Posted by 2702
Eyeballing the front I now think there is no way a 32 will fit there. Rear should be close though.
Is this because of the height or the width?
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Old 02-11-15, 03:08 PM
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I think for the front its both width and height that is going to an issue with 32mm in the front.
I think the personality of this bike does not warrant a tire bigger than a 28mm. Just makes it feel big, like going from a VW GTI to a Buick Lesabre. But that is just me if comfort and going over gravel, dirt I understand that.
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Old 02-11-15, 03:50 PM
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Originally Posted by 2702
I think for the front its both width and height that is going to an issue with 32mm in the front.
I think the personality of this bike does not warrant a tire bigger than a 28mm. Just makes it feel big, like going from a VW GTI to a Buick Lesabre. But that is just me if comfort and going over gravel, dirt I understand that.
I don't think I would go with a 32mm tire but the Schwalbe tire I want to use is notorious for running large. I've read reports of them actually measuring around 32mm on a 21mm rim.
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