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Clydesdales/Athenas (200+ lb / 91+ kg) Looking to lose that spare tire? Ideal weight 200+? Frustrated being a large cyclist in a sport geared for the ultra-light? Learn about the bikes and parts that can take the abuse of a heavier cyclist, how to keep your body going while losing the weight, and get support from others who've been successful.

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Old 06-16-09, 07:23 PM   #1
Paco97
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Switched my 38s for 28s

I put some new tires on my giant cypress today and absolutely love them. I took a short ride for my Ten Mile Tuesday and increased my average from 11.4 to 15.3 mph. Plus the tires roll a lot quieter as well. Next up the Tour de France. Well maybe not.
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Old 06-16-09, 08:25 PM   #2
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Great to hear you're going quicker, but you might want to check your computer after changing tire sizes. It's not the most obvious thing, but narrower tires tend to be a bit smaller in circumferance.

Sheldon's computer calibration chart
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Old 06-16-09, 08:44 PM   #3
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Good point, I'll check it out
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Old 06-16-09, 09:31 PM   #4
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I did that with my wife's bike and she was like a kid at Christmas. Huge difference. Don't throw out the 38's-keep them in the garage for sometime when you want to ride an unpaved rail trail.
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Old 06-16-09, 09:41 PM   #5
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I had a giant cypress and made the exact tire change you did. It did make the bike faster (Yes, I corrected my computer). I ended up going back to the original tires after I got over the thrill because it made the bike's handling much twitchier and I did not like it. The ultimate speed fix was to get a real road bike and sell the cypress. It was just a very inefficient bike.
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Old 06-16-09, 10:15 PM   #6
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I had a giant cypress and made the exact tire change you did. It did make the bike faster (Yes, I corrected my computer). I ended up going back to the original tires after I got over the thrill because it made the bike's handling much twitchier and I did not like it. The ultimate speed fix was to get a real road bike and sell the cypress. It was just a very inefficient bike.
Yeah, I'm saving up for a road bike but until then, I figured this will give me a boost. I like the handling so far with the new tires.. I also ride rail-trails so I don't want to part with the cypress totally.
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Old 06-17-09, 12:39 AM   #7
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Congrats on the upgrade....went from 35's to 28's....just re-calibrate the comp and you'll get the accu-readings that will tell the tale of your speed improvement....I set mine to 2136...it's pretty close (within .01 mile of my gps readings )
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Old 06-17-09, 01:00 AM   #8
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I did that with my Sirrus when I first got it. It was a lot quicker but I felt every bump. I finally talked Budget and Finance (Wife) into getting a road bike. So, I just did the opposite. 23's - 38 to get my commuter a little more comfy on the back side.

You won't regret doing it. You do get more speed.
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Old 06-17-09, 04:03 AM   #9
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Interesting!

I've been noticing a Giant Cypress standing outside a pawn shop for about $150. I figure it would make a good back beater for when my main bike has a busted spoke or something (would get me off my wifes bike which is too small even with mods).

One thing I was thinking about was downsizing the tires. This sort of answers that limbo question, "How low can you go?".
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Old 06-17-09, 07:22 AM   #10
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I also downsized the tires on my Cypress. They were faster and the bike felt more responsive with better acceleration and handling.

Be sure to inflate them to 100 psi several times a week, if you are a heavy rider. Skinny tires on wider rims will pinch flat if not fully inflated.

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Old 06-17-09, 11:31 AM   #11
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I thought you were talking about pant sizes
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Old 06-17-09, 12:41 PM   #12
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I thought you were talking about pant sizes
As did I.

I've also switched to 28's on my Cypress. I don't ever go offroad on that bike, that's what the mountain bike is used for.
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Old 06-18-09, 05:37 AM   #13
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My LBS recommended 28s as the lowest but did say that 25s might work if I was daring.

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Interesting!

I've been noticing a Giant Cypress standing outside a pawn shop for about $150. I figure it would make a good back beater for when my main bike has a busted spoke or something (would get me off my wifes bike which is too small even with mods).

One thing I was thinking about was downsizing the tires. This sort of answers that limbo question, "How low can you go?".
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Old 06-18-09, 05:38 AM   #14
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As did I.

I've also switched to 28's on my Cypress. I don't ever go offroad on that bike, that's what the mountain bike is used for.
I actually am a 38 and would love to one day say I dropped to a 28, but then I might be like the witch from wizard of oz, "i'm melting, I'm melting.
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Old 07-06-09, 08:59 AM   #15
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I bought the Giant Cypress at the pawn shop. Got them to drop the price to $120. After minimal work it rides pretty good. Still needs some work.

It's a strange bike for a Cypress. Sticker on the seat tube says Giant 41 cro - moly 30 main frame butted. It has some oversize tubes for cromoly which is why I thought it was aluminum at first ( that and Giant usually makes the Cypress in aluminum except Cypress ST but mine doesn't say ST ) It also came with a rigid fork. No front end bouncy bouncy.

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Old 07-06-09, 09:56 AM   #16
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I bought the Giant Cypress at the pawn shop. Got them to drop the price to $120. After minimal work it rides pretty good. Still needs some work.

It's a strange bike for a Cypress. Sticker on the seat tube says Giant 41 cro - moly 30 main frame butted. It has some oversize tubes for cromoly which is why I thought it was aluminum at first ( that and Giant usually makes the Cypress in aluminum except Cypress ST but mine doesn't say ST ) It also came with a rigid fork. No front end bouncy bouncy.
I am wondering if you have an early vintage Cypress. I have a mid 90's Sedona that was considered their mountain bike at the time. It has the rigid fork too, so it would be a fair guess to say that a Cypress of the same vintage would be similar to my Sedona. It is also a cromoly bike, so you might want to see what you can find out that way.
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Old 07-06-09, 10:27 AM   #17
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Just took some a couple of pics before the battery went out on my camera.





I replaced the seat and seatpost along with the clamp. Took the front wheel off my Draft and put it on the Cypress because the front wheel was way out of true and changed the handlebars. The bike looked like someone had gotten into a slight "fender bender" with it mostly affecting the front wheel and handlebars. Everything else os in fairly good shape ( pedals are a little beat up but I have an old set SR pedals).
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