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Marin Hamilton 2008

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Old 09-09-07, 08:25 AM
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ash4781
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Marin Hamilton 2008

Had a look at the Marin Muirwoods today. Will probably order one as all the had was a 20.5" . Anyway I got a 2008 Marin brochure and there's this Hamilton (Urban bike) single speed with 29" wheels.

Questions-

1. 29" wheels. What's with that ? Could you fit 700C wheels on it ?

2. Is the geometry 'ok' for winter commuting ?

3. Is this a new model ?


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Old 09-09-07, 09:27 AM
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I could be wrong, but I seem to recall hearing that 29" is <oversimplification warning> just the mountain bike way of saying 700c</oversimplification warning>. I don't know that there are geometries that work "better" for winter commuting -- more important would be fender eyelets and plenty of clearance for fenders with big tires.
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Old 09-10-07, 06:11 AM
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29" is fairly close to 700cc - there's a 4mm difference IIRC. You may be able to swap wheels, you'll just have to adjust your brakes by a couple mm.
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Old 09-10-07, 07:05 AM
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Is the fork able to be switched for a suspension? It appears to be proprietary.
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Old 09-10-07, 07:40 AM
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Originally Posted by ash4781 View Post
1. 29" wheels. What's with that ? Could you fit 700C wheels on it ?
29er and 700c have the same ISO diameter 622. The tires make a 29er, not the rims.
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Old 09-10-07, 08:45 AM
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If it can hold fenders and if those are canti brakes, that would be great for winter commuting.
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Old 09-10-07, 12:37 PM
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That chainring looks awfully small for an urban bike. I'd think you'd spin out pretty quickly. Otherwise, nice looking rig.
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Old 09-10-07, 01:11 PM
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From the brochure

33T and 20T

Fork: Chromoly rigid 1 1/8"

Brakes: forged alloy linear pull.

Are those disc mounts on the front ?

http://www.leisurewheels.co.uk/produ...t_City_Tourers
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Old 09-10-07, 01:28 PM
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29er = 700c. Generally the only difference is that 29er rims are wider to take mountain bike style tires.
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Old 09-10-07, 04:18 PM
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I feel a little ripped off. My bike (that I made from a Nashbar frame and a bunch of other random parts) looks just like this, except that it's blue, is 26" instead of 29, and has a front disc. Who from Marin is following me around and copying my bike?!
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Old 09-15-07, 01:41 AM
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How fast could you go on this bike ? ( current 33T and 20T)

Or is it setup for acceleration ?

As for the cantilever brakes would I have to say need to fit a Kona P2 fork and get some new brakes for the front ?

CHeers,

Ash.
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Old 09-15-07, 10:51 AM
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33x20 seems kind of slow. The gear calculator at sheldonbrown.com says 100rpm is only good for 14.2 mph. My 26" bike is a 36x14, and the gear calc says that's good for 19.9 mph at 100rpm (which seems accurate after 5 months of riding it). So definitely get a smaller cog for the rear.

Try the gear calculator yourself at: http://sheldonbrown.com/gears/

Disc brakes are fussy. Stick with the front cantilever. I sort of regret putting the front disc on my bike.
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Old 09-15-07, 12:06 PM
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these are generally called monocog bikes and are gaining popularity for mtn biking, downhill, and cyclocross -- that's why the gearing is so low. they don't have suspensions, it's kind of a "back to simplicity" thing for mtb'ers.

compare viz these guys:
Raleigh XXIV http://www.mtbr.com/reviews/29er/product_127623.shtml
Redline monocog http://www.redlinebicycles.com/adultbikes/monocog.html


29" is the diameter to the outside of the tire, as somebody mentioned above the rim diameter is the same as 700C - 622mm.

yes those are disc mounts on the front fork, so they can say its "disc ready" without having to actually equip it.

no probably not able to run fenders, there's no eyelets brazed in the rear and the rear-facing track end style dropouts would make it impossible to remove the wheel without de-mounting the fender. but (being from california) i don't know whether winter commuting for you really requires fenders - some of the icebike/winter forum folks could speak better to this but i seem to recall that riding through snow in fenders just makes the fenders jam up with snow and ends up messier than running without.
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Old 09-16-07, 06:54 AM
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http://www.flickr.com/photos/5180704...7601784146284/




It's difficult to see on the 1st pic (Hamilton 29er) but it looks like mud guard / fender holes are on the front fork. The Muirwoods 29er in the second pic' has the same fork (I think).

Front fenders only ?

That Surly Karate Monkey is nice!
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Old 09-16-07, 10:08 AM
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Originally Posted by ahpook View Post
these are generally called monocog bikes and are gaining popularity for mtn biking, downhill, and cyclocross -- that's why the gearing is so low. they don't have suspensions, it's kind of a "back to simplicity" thing for mtb'ers.
Yes, but as soon as you put street tires on the bike, the gearing is ALL wrong. Someone screwed up when they put this bike together.
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Old 09-16-07, 12:56 PM
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Originally Posted by knucklesandwich View Post
That chainring looks awfully small for an urban bike. I'd think you'd spin out pretty quickly. Otherwise, nice looking rig.
I agree. The gearing is better suited to singlespeed mountain biking, even with the fattest 29'ers out there (700x50 or 700x56). It's still around 47-48" with those things on. Skinnier tires would give even lower gear inches.
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Old 09-16-07, 01:41 PM
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Originally Posted by fat_bike_nut View Post
I agree. The gearing is better suited to singlespeed mountain biking, even with the fattest 29'ers out there (700x50 or 700x56). It's still around 47-48" with those things on. Skinnier tires would give even lower gear inches.
If one rode this bike would they be peddling like a mad thing and barely moving ?
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Old 05-04-08, 01:45 PM
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Just picked up one of these on a good sale - seems to be very well suited to a generally hilly urban environment (Seattle) - gearing tops out pretty quickly, but that pays off in good climbing ability. Frame and build quality appears excellent - very smooth bike for a zero suspension design.

It comes with a few extra rear cogs to experiment with the ratios, no extra front though - might have to order out for one assuming the current balance doesn't fit.

Summary - cheaper than single speed roadies such as the Giant Bowery and Trek Soho S and Bianchi San Jose - more comfortable than any of those as well due to the fat tires and a rather upright seating position. Definitely slower, but in a city environment it doesn't matter much anyway - block to block for trips of 1-5 miles speed doesn't make much difference.
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Old 05-04-08, 02:57 PM
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I bet you could go down to 700x28 tires without changing the rims. Swap in a larger chainring and you are set.
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Old 05-04-08, 03:41 PM
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If it came with 36 spoke wheels, the Marin Muirwoods 29er might make a decent tourer. The fork on the Hamilton and Muirwoods appears to have lowrider and fender mounts, and judging by the picture they have decent tire clearances too.

Last edited by Ken Wind; 05-05-08 at 01:21 AM.
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Old 05-04-08, 04:06 PM
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Yep - both 700c and '29er' rims are the same ISO spec size - very wide range of tire choices available. The stock Continentals are pretty nice, but Schwalbe Big Apples seem interesting for this bike.
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Old 05-04-08, 04:49 PM
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I don't get it, street tires but mountain gearing

Made strictly for really hilly cities?
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Old 05-04-08, 04:59 PM
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Originally Posted by dwoloz View Post
I don't get it, street tires but mountain gearing

Made strictly for really hilly cities?
A new chainring and chain is less than $50, and you may not need a new chain.

Last edited by Ken Wind; 05-04-08 at 09:57 PM.
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Old 05-04-08, 06:15 PM
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i have a 04 MARIN "VENEZIA" never have had one problem with it.mine is more of a weekend racer&part-time commuter,yours looks like it can take all kinds of terrain for sure!plus it has to be good it's made in the good "ol U.S.A., MARIN,CA.!
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Old 05-04-08, 07:56 PM
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Included gears are as follows, along with speed at 80rpm according to Sheldon's Gear Calculator

Crank - 33T

Rear freehub at
15T == 15.3mph
17T == 13.5mph

Rear fixed at
15T == 15.3mph
20T == 11.4mph

Seems about right.
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