GT Marathon 3.0 XC Full Suspension

4.5/5 (4 Reviews)
Weight : 30 lbs

Product Description

  • Suspension: Suntour SR XCR LO fork,100mm travel; Fox Float R shock
  • Handlebar: GT Oversize XC Riser Bar, 31.8 mm
  • Seat Post: Micro adjust seatpost
  • Saddle: WTB Speed V saddle
  • Pedals: Shimano PDM -520
  • Stem: GT 4 bolt face with Tig welded extension and 31.8mm clamp
  • Frame: GT 6061 aluminum ID4 full suspension frame, 4” travel

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Reviews 1 - 4 (4 Reviews Total)

User Reviews

Overall Rating:4
Value Rating:5
Submitted by desolder a Weekend Warrior from Pleasanton, CA

Date Reviewed: January 30, 2009

Strengths:    This is my first full suspension bike. After riding this for the last two months, I realize now that I should have made the switch a long time ago. The i-drive system does a fantastic job of absorbing bumps both big and small. Instead of chattering over bumps, the suspension enables the tires to follow the terrain, giving me a MUCH smoother ride, greater control and better power transfer to the ground. I can also run higher pressures in the tires, so sprints on flat hard trails are much faster. Out of the saddle pedal mashing is not a problem since energy robbing bob is minimized thanks to the i-drive and ProPedal black magic. The Fox Float R rear shock only has the rebound adjustment (and pressure of course). It lacks the lockout and Propedal adustment of it's higher end brothers, but the fixed setting Propedal seems to work just fine at controlling bob and I never use lockout anyway. The Suntour XCR-LO fork has a preload and lockout feature. It's smooth, but it lacks damping so it can get a little bouncy. The Deore shifters/derailer may not be the quickest or quietest, but they work even when caked with mud. No problems with the Deore hub so far, although the reviews on mtbr are shockingly poor. We'll see how it holds up. The Tektro hydraulic brakes do an excellent job of stopping the bike even when they get wet, which is where rim brakes become almost useless. Lately, however, they don't seem to be as strong as when new so I might need some new pads after only two months of twice a week riding. The WTB Speed V saddle is no featherweight, but it's comfy and I can ride for several hours without any soreness.

Weaknesses:    After a few rides, the pivots started creaking loudly. Apparently this is a common problem and it's easily fixed by re-tightening them and applying some threadlocker. I also had a problem reliably shifting into the small chainring. I never figured out why since the problem went away when I swapped the crankset. The fork is surprisingly heavy, despite being made of magnesium. Speaking of weight, the total weight is more than I thought it would be. I weighed it at 33 pounds and it's a medium frame.

Bottom Line:   
This is a very good full suspension bike for not a lot of money. For a few hundred dollars more, the Marathon 2.0 is noticeably lighter and has better components. I would have bought the 2.0 but it wasn't in stock at the time so I decided to get the 3.0 and upgrade over time.

Expand full review >>

Favorite Trail:   Anthony Chabot

Duration Product Used:   3 months

Price Paid:    $800.00

Purchased At:   Performance Bicycle

Bike Setup:   Stock except for the crankset. It came with Deore M442 170mm cranks which are too short for my liking, so I swapped it out with Deore M510 175mm cranks, which are also a bit lighter.

Overall Rating:5
Value Rating:5
Submitted by SanDiegan420 a Weekend Warrior from San Diego, CA

Date Reviewed: January 5, 2009

Strengths:    Nice design, great frame, bike feels very solid for being under 30 lbs. Classic GT quality. Good XC bike.

Weaknesses:    I think the brakes are kind of weak for hydraulic discs, but still better than rim brakes. Maybe mine need to be broken in more, they are still new.

Bottom Line:   
I like this bike a lot. The suspension is tight and smooth. Its got just enough suspension travel for comfort but isnt excessively plush. Great for long rides, the bike is very efficient. Shimano Deore gears are top notch. In my opinion, this is one of the best full-suspension value for under $1000 new.

I will update this review as the months go by, this GT marathon is still new to me.

Expand full review >>

Favorite Trail:   Blue ridge - Wrightwood

Duration Product Used:   Less than 1 month

Price Paid:    $999.00

Purchased At:   Performance Bike

Similar Products Used:   Kona Coiler Dee-Lux

Bike Setup:   All stock the way GT made it

Overall Rating:5
Value Rating:5
Submitted by heykoolaid3 a Weekend Warrior from Phoenix,AZ,USA

Date Reviewed: September 1, 2008

Strengths:    Smooth Ride, Sturdy design, Hydraulic brakes.

Weaknesses:    None at this time.

Bottom Line:   
Wanted a good equiped Mountain Bike to get back in the game. I had a Cannondale(still have) M700 from years gone by. I wanted a full-suspension bike to beat on. This one is great. We just finished Trail #100 in Phoenix and it performed perfectly! I like the way the full-suspension allows me to take the bike in places non-suspension bikes would have made me nervous. Great price, good price. X100 Shocks work great! Not sure if they are great or good, but I'm liking them!

Expand full review >>

Favorite Trail:   Aiea Loop Trail, Honolulu

Duration Product Used:   Less than 1 month

Price Paid:    $1000.00

Purchased At:   Performance Bike

Overall Rating:4
Value Rating:5
Submitted by Dan a Weekend Warrior from San Diego, CA, USA

Date Reviewed: February 24, 2008

Strengths:    Responsive rear suspension; comfortable ride; hydraulic disc brakes, Shimano Deore derailers

Weaknesses:    SR Suntour X100 front suspension is not the smoothest. Would have liked to see a higher-end front fork on the bike.

Bottom Line:   
Just recently purchased this bike (2/08), my first full-suspension. Super-smooth ride. Seems like GT has put a lot into it for the money. Can't wait to test it out on the trail.

Expand full review >>

Favorite Trail:   Noble Canyon

Duration Product Used:   Less than 1 month

Price Paid:    $977.00

Purchased At:   Performance Bike

Similar Products Used:   none

Bike Setup:   see "Product Strengths" above or GT website.

Reviews 1 - 4 (4 Reviews Total)

Review Options:  Sorted by Latest Review | Sort by Best Rating

Fork upgrade for a GT Marathon 3.0

I am interested in making an upgrade to my fork on a GT Marathon 3.0. Based on the good reviews and reasonable price, I was considering the following fork. [url][/url] Here is a link to the GT bike that I have [url] ... Read More »

fork upgrade to 2008 Marathon 3.0

this is the bike: [url][/url] Thinking about a fork upgrade. Options RS Revelation 110-140mm U-turn Fox Float RLC or R (140mm) Fox Talas Marzocchi 44 ATA 100-140mm but also open to any o ... Read More »

Question about GT Marathon 3.0 seat height

I purchased a new GT Marathon 3.0 today from Performance Bike. Based on the sale they were running, I was able to get it for $850. Based on the components that the bike has, it seems like a pretty good deal. I am fairly new to mountain biking and I have a question about the seat height on this ... Read More »

GT Marathon 3.0

Can't find much info about this bike. Is this a great deal or a case of getting what you pay for? [url][/url] It seems nicely spec'd (except maybe fork and brakes), but I don't know anything about i-drive. ... Read More »

Read More »


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