Which one is better?

"Cyrus" <[email hidden]> wrote in message "]news:[email hidden]...

Quoted message said:

Hi! Can anyone give me advise about that 3 model of MTB? Which one is better? All same price
AUD$299. Thanks a lot!

<snip>

Define the type of riding you will be doing and then test ride the bikes that still meet
your criteria for that type of riding. Go to a reputable store and ask lots of questions.
Then buy one. 😉

hippy

In article said:

Hi! Can anyone give me advise about that 3 model of MTB? Which one is better? All same price
AUD$299. Thanks a lot!

Melbourne Cyrus

The bikes are very basic MTB, probably more suited for occasional recreational riding, if you ride
either of these every day look to spend the purchase price in repairs in about 12 months time,
sooner if you do any realy rough riding.

Go for a test ride, talk to the guy in the store about the sort of riding you intend to do, but at
that sort of price range most bikes will be the almost the same.

Cheers

Joel

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| Joel Mayes | Linux and OpenBSD | /"\ ASCII ribbon | Accordionist | | \ / campaign against |
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Repairs? what sort of repairs would you need to pay for that you can't do yourself?

Joel Mayes said:

In article said:

Hi! Can anyone give me advise about that 3 model of MTB? Which one is better? All same price
AUD$299. Thanks a lot!

Melbourne Cyrus

The bikes are very basic MTB, probably more suited for occasional recreational riding, if you ride
either of these every day look to spend the purchase price in repairs in about 12 months time,
sooner if you do any realy rough riding.

Go for a test ride, talk to the guy in the store about the sort of riding you intend to do, but at
that sort of price range most bikes will be the almost the same.

Cheers

Joel

Hi there
I bought the GT Palomar 2yrs ago as my first MTB
I've used it every day for commuting since then and been on lots of 30-60km day rides on bike paths and railtrails.
I haven't had to do any repairs at all and have only oiled it twice
The only problem is it's very heavy but what do you expect at that price
It was much easier once I got semi-slick tyres and bar extensions help on long rides
If that's all you can afford it's better to be biking than not1
My next bike will be a light wieght tourer or road bike but I got bogged down in choice so stopped looking.
goodluck![QUOTE]Originally posted by Arpit
[B]Repairs? what sort of repairs would you need to pay for that you can't do yourself?

Joel Mayes said:

In article said:

Hi! Can anyone give me advise about that 3 model of MTB? Which one is better? All same price
AUD$299. Thanks a lot!

Melbourne Cyrus

The bikes are very basic MTB, probably more suited for occasional recreational riding, if you ride
either of these every day look to spend the purchase price in repairs in about 12 months time,
sooner if you do any realy rough riding.

Go for a test ride, talk to the guy in the store about the sort of riding you intend to do, but at
that sort of price range most bikes will be the almost the same.

Cheers

Joel [/B]

Add about $1K to the price and you might get a decent bike to start with! At $299 it's a good bike for the kids to ride to school, but if they're into designer clothes they won't want to be seen dead on it.😠

Cyrus:

Quoted message said:

Hi! Can anyone give me advise about that 3 model of MTB? Which one is better? All same price
AUD$299. Thanks a lot!

Melbourne Cyrus

Special Edition Malvern Star - Aspect Frame: 7005 Oversized Aluminium frame with replaceable rear
drop out. Forks:Adjustable RST 191TL Suspension fork, alloy crown. Shifters: Shimano 24 speed
indexed gears with Rapidfire Shifters. Rear Derailleur: Shimano Acera 8 speed. Brakes: Alloy
Linear pull brakes. Wheels: Alex Alloy rims; Stainless steel spokes & quick release alloy hubs.
Features: Alloy cranks, alloy seat post and alloy kickstand.
*******************************************************

Give this one a miss, mainly for the 7005 Al tubing. 7005, while

susceptible to corrosion. Since scratches will be unavoidable on your frame, there will be scratched
spots that may act as stress risers when they corrode.

Quoted message said:

GT- Palomar FRAME: GT Triple Triangle design frame, with protaper down tube, hi-tensile
steel tubing with semi forged dropouts. FORK: RST Omni CL CRANKSET: Suntour CW-128, 48,38,28
BB: Sealed Mech PEDALS: High Impact nylon ATB FRONT DER: Shimano TY-32 REAR DER: Shimano
Acera SHIFTERS: Sram MRX FREEWHEEL: Shimano 7 Speed 14-28 HG CHAIN: HG-50 RIMS: Alloy ATB
TYERS: Tioga Factory XC 26 x 1.95 FRONT HUB: Alloy QR, with sealed system cro-mo axle REAR
HUB: Alloy QR, with sealed system cro-mo axle SPOKES: Stainless steel 14 gauge FRONT BRAKE:
Tektro Linear Pull REAR BRAKE: Tektro Linear Pull BRAKE LEVERS: Tektro HANDLEBAR: 20 mm
Rise, 6 degree bend, anatomically sized STEM: GT ATB, Forged threadless 25 degree rise with
two bolt alum face plate GRIPS: GT ATB made in China
*********************************************************
Mongoose- Switchback SX Frame: Comes in Gents & Ladies (ladies small only) designed HiTen
steel frame with CrMo seat tube. Forks: MOZO USA C-710 suspension forks. Gears: 21 Speed;
Sram MRX 7 speed shifters matched with Shimano derailleurs. Brakes: Alloy linear pull
brakes. Wheels:Alloy Alex Z-1000 26" rims; alloy quick release hubs; & stainless steel
spokes. Features: Comfortable Selle Royal Freedom Gel seat and alloy suspension seat post.
made in Taiwan

Ride these last two and see which fits you better. Replace components as they get worn; this is a
reasonable way to upgrade a bike. You may also want to see if the shop can do a deal for you on
component swaps: I find grip shifters a right PITA.

In article said:

Repairs? what sort of repairs would you need to pay for that you can't do yourself?

Even if you can do most repairs your self (I can't I don't have the time) you still have
to but parts

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| Joel Mayes | Linux and OpenBSD | /"\ ASCII ribbon | Accordionist | | \ / campaign against |
| Musician | My PC, My Rules | X HTML mail and | Music Teacher | | / \ postings |

Jose Rizal said:

Give this one a miss, mainly for the 7005 Al tubing. 7005, while

Quoted message said:

susceptible to corrosion. Since scratches will be unavoidable on your frame, there will be
scratched spots that may act as stress risers when they corrode.

What is the source of this myth? Aluminium alloys does not corrode, because they instantly form
oxide layer on the surface when exposed to air. Perhaps this could be an issue when you rode your
bike on the beach only, but still it would take years to weaken the frame.

--
Best regards, Rado bladteth Rzeznicki widzew.netrower.htmlOpen ↗
"][email hidden] MCM #252

Rado bladteth Rzeznicki:

Quoted message said:

Jose Rizal said:

Give this one a miss, mainly for the 7005 Al tubing. 7005, while

Quoted message said:

Quoted message said:

susceptible to corrosion. Since scratches will be unavoidable on your frame, there will be
scratched spots that may act as stress risers when they corrode.

What is the source of this myth? Aluminium alloys does not corrode, because they instantly form
oxide layer on the surface when exposed to air. Perhaps this could be an issue when you rode your
bike on the beach only, but still it would take years to weaken the frame.

Read up on your materials science. Different Al alloys exhibit

cracking due to soluble alloying elements copper, magnesium, silicon,

to SCC than other types of aluminum alloys when tensile stresses are developed in the
short-transverse direction at exposed surfaces (see reference below). Care must also be taken in
properly heat-treating 7005, as it can lose up to half its strength on welding temperatures. Can you
be assured that a sub-$500 bike frame has been heat-treated appropriately?

For the layman: key-to-metals.comArticle17.htmOpen ↗

Jose Rizal said:

Read up on your materials science. Different Al alloys exhibit different properties.

Nice reference, but I've got one question. What do you consider as "damaging" environment?

Quoted message said:

Can you be assured that a sub-$500 bike frame has been heat-treated appropriately?

No and the alloy grade doesn't change this assurance at all.

--
Best regards, Rado bladteth Rzeznicki widzew.netrower.htmlOpen ↗
"][email hidden] MCM #252

Rado bladteth Rzeznicki:

Quoted message said:

Jose Rizal said:

Read up on your materials science. Different Al alloys exhibit different properties.

Nice reference, but I've got one question. What do you consider as "damaging" environment?

What I consider damaging environment is irrelevant. It's what the Al alloy sees as damaging
environment which matters.

From key-to-metals.comViewArticle.aspOpen ↗

"Well-known specific environments include water vapor, aqueous solutions, organic liquids and liquid
metals. Stresses sufficient for crack initiation and crack growth can be far below the stresses
required for gross yielding, especially in those alloy/environment combinations that are of
practical importance, e.g., high strength aluminum alloys in air."

7005 used on bike frames fits the bill for these conditions.

Quoted message said:

Quoted message said:

Can you be assured that a sub-$500 bike frame has been heat-treated appropriately?

No and the alloy grade doesn't change this assurance at all.

hence some do not require heat-treatment at all. Another point is that the 7005 alloy, although
having a narrower melting point range, still possesses a higher crack sensitivity during welding
than other Al alloys and hence require more care during welding. I don't think you read the
reference at all.