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Diamondback Sync'r Hardtail Mountain Bike (Dark Blue, S, L, XL) Expired

$750
$1,500.00
+ Free Shipping
+79 Deal Score
46,587 Views
Diamondback has Diamondback Sync'r Hardtail Mountain Bike (Dark Blue, S, L, XL) for $750. Shipping is free.

Thanks to Community Member ChevyUNC3814 for posting this deal.

Key Features:
  • Sizing:
    • Small: 5'4" - 5'7"
    • Large: 5'10" - 6'2"
    • XL: 6'2" - 6'6"
  • 27.5" tires
  • Aluminum hardtail
  • Low-slung frame
  • RockShox Recon RL suspension fork with 140mm of travel
  • SRAM SX Eagle 1×12 single-ring drivetrain with a wide 11-50 gear range
  • Shimano hydraulic disc brakes
  • Diamondback AL35 tubeless-compatible wheelset.
Good Deal?

Original Post

Written by
Edited November 21, 2022 at 03:27 PM by
https://www.diamondback.com/bikes...ync-r-4520

Versatile — that's what's always made our progressive trail bikes popular. These are bikes that are as at home blasting down trails alongside long-travel, full-suspension bikes at they are surfing mellow sections of singletrack. The Sync'r is our top of the line, do-it-all aluminum hardtail. The heart of the bike is a low-slung frame that's both playful and confident. We've hung the Sync'r chassis with equally stellar components that include a RockShox Recon RL suspension fork with 140mm of travel, a SRAM SX Eagle 1×12 single-ring drivetrain with a wide 11-50 gear range, powerful Shimano hydraulic disc brakes, and our own Diamondback AL35 tubeless-compatible wheelset.
The Sync'r holds its own with no-nonsense hardtail precision and all-mountain capabilities, making it a great choice for any mountain biker.
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Deal
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$750
$1,500.00

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Featured Comments

True, it is 27.5+, but it doesn't need to be on 27.5x2.8 "forever": tires are consumables.

I had a Marin San Quentin with decently wide 27.5x2.5 tires, and it was notably easier to flip and hop than my 29x2.4/2.6 bikes. Yes, the total diameter is not dramatically different, but the gyroscopic effect is as the wheels get not just a bit lighter, but also smaller in diameter.

Also on people commending on it being short: yes, it is not the longest of bikes, thus I've commented above it is "decently modern". Its geo is corrected for what it is tho. If you were to measure where your CG (waist) will be on this vs. a San Quentin vs. a Norco Torrent when seated, differences are not that dramatic, as seat post angles are slacker on the Diamondback.

Sure, the Torrent is much longer overall, but this is a benefit for those that push the bike and are putting lots of body english towards the front in order to weigh the bike properly and get the traction from the front tire. The Torrent will also be a challenge around tight switchbacks going both up and down, as the bike feels "too long" and the short stays allow you to lean forward A LOT to allow for the bike not to wheelie. Definately not the bike for 35mm long stems IMHO, or at least with this layman and the steep ups in SoCal trails! There is a reason the bike is speced by Norco with a 50mm stem, duh. Finally, there can be "too long" a bike. IMHO, HTs at 480mm reach + 150mm fork travel is too long for me at 6'. Remember, HTs effectively lengthen as the fork compresses into its travel.

This Sync'r will reward a more casual riding and forgive a less aggressive position, that could result in front-tire wash-outs on "aggressive" bikes. The geo will not be cramped, it is shorter because the bike is not as DH focused as a Torrent or Honzo ESD, and in my book, this is a good thing: people that ride blues and greens don't need the above, and people who ride blacks and double blacks, do not look into value HTs to ride them.

This is the bike to get if you were aspiring to get an Axum and ... change everything, only you get to keep almost everything and will end up costing you less $.

Those that nit-pick on the Sram SX...sure, it is Sram's worse 12 speed drivetrain but at the same time, it is a decent 12 speed drivetrain. You cannot buy the parts of this bike for $750, even used. It is a pretty good value.

Those that claim that this is not a beginner friendly bike are ... I don't know. People Ι dissagree with.
That's a lot of bike for $1500. It's a hell of a deal for $750.
Good bike. Decently modern geo, modern standards throughout. External routing is a blessing for people to do easy upgrades, especially with brakes.


This is a 27.5 bike and easier to throw around than a 29er, but IMHO shorter riders have extra reasons to look into a 27.5 (29 wheels are a bit overwhelming for casual riders). Too bad M is out of stock.

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Joined May 2010
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> bubble2 1,613 Posts
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xmonger
12-07-2022 at 10:21 AM.
12-07-2022 at 10:21 AM.
Quote from extra :
I put mine together this evening. The rotors are rubbing and I managed to get the rear brake adjusted, but the front rotor is still rubbing. It's not terrible, but annoying. To be fair all of the bikes I bought new had this problem out of the box. The rotors look fairly true to me as well. Going to try a few more things when I have more time.

On the other hand, my derailleur hanger is also bent, so the shifting is out of whack. Not surprised and there was zero protection on that side of the bike. I have the alignment gauge, which I've used successfully in the past, but going to contact CS to get a replacement hanger anyway.
If the rotors are true, loosen the two mounting bolts slightly and apply the brake to center the caliper on the rotor, then cinch the bolts down while continuing to apply pressure.
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semjase
12-07-2022 at 12:08 PM.
12-07-2022 at 12:08 PM.
Last night I converted the sync'r's alexrims wheels and 3" front tire (and specialized 2.6" on the rear) to tubeless schrader.
Some notes:
  • DO NOT use the factory-installed fiber-reinforced plastic bonded rim tape that comes on the wheels. It sucks. Air gets underneath it and it's VERY hard to get sealant on the rims surface to seal under the tape, and the tape might delaminate in those areas that do seal initially. I installed and seal my wheels with the crappy OEM tape and figured this out the hard way. I have all kinds of sealant INSIDE my rims' cavities now...thanks Alexrims (and Diamondback).

  • Factory kenda sync'r tire tubes are 13.5 ounces each in weight. I used about 5 ounces of sealant per wheel, so the weight savings in total on the bank is one pound. Great way to take a full pound off your bike!

  • Aluminum schrader vales allow you to get way more airflow into your tire from a compressor, which makes mounting much easier. Plus, they are much more durable than presta, and only added about 2 grams. Also, valve cores are always serviceable (a must). These rims were factory drilled almost large enough for schrader. A 5/16th bit finished the job. For the best sealing, take the rim's inside hole to 21/64ths. I use some synthetic grease between the rim and the valve stem gasket to help.
  • If you use the factory rim tape like I tried, and have success the first time, let me know. Mine was a disaster.
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Last edited by semjase December 8, 2022 at 01:30 PM.
Joined Sep 2020
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> bubble2 80 Posts
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NervousSoda848
12-07-2022 at 01:50 PM.
12-07-2022 at 01:50 PM.
Quote from cfranchile :
I am 6'0" shorter legs longer torso. I ordered a large and it fits great. A few years ago I bought a Diamondback Overdrive 29er size large and it was too big (felt big and the standover height was just too tall). I returned it and bought a Diamondback Axis LT 27.5 in size medium and it was fine, but probably a bit on the small side. This one in the large feels perfect. Interestingly the distance from seat to handlebars on this bike is exactly the same as the Axis in a medium. But it feels like a better size for me.

Not sure how this helps, but I think you may be good with your XL. It's a fun bike! Hope it works out!

I am 6 feet tall and ordered the L. Personally the bike feels a bit on the large side for me, but maybe it is something to get used to.

Mine came with 2.8 tires.
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semjase
12-07-2022 at 02:25 PM.
12-07-2022 at 02:25 PM.
Quote from camoeto :
They should replace your cassette under warranty. I had a couple of Eagle drivetrains that were properly set up that never did this (GX and X01). I don't think SX has much to do with this since the only difference between SX and the more expensive ones as far as the mechanical aspect is quality of materials/weight/tolerances. I mean the upper cogs folding might be related to cheap steel being used on the SX cassette, but it should have never gotten to this point since the chain shouldn't have fallen to smaller cogs on a partial backpedal. My guess would be a derailleur hanger bent just enough to affect chain alignment for the chain to drop to a lower cog on a backpedal too easily, but not enough to be noticed on forward pedaling. Also check that b-tension gap is set to spec. If the b-gap is too big, it might lead to something similar. Also, check that the chain is properly sized and not too long.

Also, not sure how much difference this will make, but the NX Eagle cassette (PG-1230) is made of better quality steel and is a bit lighter than the SX Eagle cassette (PG-1210). A couple of online shops have it on sale for $55.

Did you see this reddit? Not really a clear answer here, but since some people don't get this issue I think it's likely setup related even if shifting seems spot on.
https://www.reddit.com/r/bikewren..._fix_sram/
Thanks, diamondback said no problem replacing the cassette at no cost and I will definitely look at everything you mentioned, appreciate it all.

Update: cassette already came! They sent me an NX too. It's 13/50 instead of 11/50 but I can custom gear it by mixing with the SX.

Edit: it's an 11/50, I just didn't realize the final gear is packaged on the back of the cassette.

I noticed the NX has an aluminum spider for the tall gears, SX has a stamped steel spider. I think the gears are all identical machining and material otherwise.
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Last edited by semjase December 9, 2022 at 08:05 AM.
Joined Jul 2015
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> bubble2 279 Posts
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SupacatNV
12-07-2022 at 10:55 PM.
12-07-2022 at 10:55 PM.
Quote from EliteGeek :
You probably need to play with the barrel adjuster to decrease the tension. Make sure you're actually in the highest gear by clicking the shifter all the way.

On another note, I put together the bike today but the brakes are rubbing on the rotors no matter how I adjust. Might be the new set of pads need some breaking in but is anyone else having brake rub on the rotors? The rotors are pretty true but not perfect.
Put mine together yesterday. Have a rub every rotation. Was told it might be cause they were new. In no way an expert but was told not to worry about it unless its slowing tire down. Definitely looking for suggestions from the more skilled riders.
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Last edited by SupacatSF December 7, 2022 at 11:46 PM.
Joined May 2011
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> bubble2 259 Posts
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extra
12-07-2022 at 11:43 PM.
12-07-2022 at 11:43 PM.
Quote from SupacatSF :
Put mine together yesterday. Have a rub every lrotation. Was told it might be cause they were new. In no way an expert but was told not to worry about it unless its slowing tire down. Definitely looking for suggestions from the more skilled riders.
Make sure to bed in your brakes first - https://www.youtube.com/watch?v=BWQxGzHQZVU&t=7s

If there is still a rotor rub, try this method - https://www.youtube.com/watch?v=xWmlK5Qbt_U
It's easier to do it with a tool (i.e. Hayes Brake Pad & Rotor Alignment Tool or something similar and much cheaper), but the idea is the same. If the rotor is bent considerably (unlikely in your case), you will have to straighten it using the rotor truing fork, or get a new rotor.
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> bubble2 279 Posts
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SupacatNV
12-07-2022 at 11:47 PM.
12-07-2022 at 11:47 PM.
Quote from extra :
Make sure to bed in your brakes first - https://www.youtube.com/watch?v=BWQxGzHQZVU&t=7s

If there is still a rotor rub, try this method - https://www.youtube.com/watch?v=xWmlK5Qbt_U
It's easier to do it with a tool (i.e. Hayes Brake Pad & Rotor Alignment Tool or something similar and much cheaper), but the idea is the same. If the rotor is bent considerably (unlikely in your case), you will have to straighten it using the rotor truing fork, or get a new rotor.
Super appreciate the information! Will start researching now.
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Joined Aug 2021
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> bubble2 23 Posts
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bobbyh1wa
12-08-2022 at 01:36 PM.
12-08-2022 at 01:36 PM.
Just got mine . The tires are not tubeless ready. These are gonna leak if trying. Gonna look for some new tires.
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Joined Jul 2006
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> bubble2 94 Posts
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Pajama_Man
12-08-2022 at 06:08 PM.
12-08-2022 at 06:08 PM.
Just got mine. Ordered a small and got 27.5x3.0
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bobbyh1wa
12-08-2022 at 06:10 PM.
12-08-2022 at 06:10 PM.
Quote from Pajama_Man :
Just got mine. Ordered a small and got 27.5x3.0
I am 5 7 and the small is a perfect fit. the shock is smooth and the bike feels great, no problem with the back pedaling.
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Joined Jul 2006
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> bubble2 94 Posts
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Pajama_Man
12-08-2022 at 06:15 PM.
12-08-2022 at 06:15 PM.
Yeah I'll try the tires on trail before I decide to change them. I'm not too worried about pavement riding as that's what my road bike is for Big Grin
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> bubble2 851 Posts
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semjase
12-09-2022 at 08:09 AM.
12-09-2022 at 08:09 AM.
Quote from bobbyh1wa :
Just got mine . The tires are not tubeless ready. These are gonna leak if trying. Gonna look for some new tires.
The tires are fine but they DO REQUIRE SEALANT, the rim tape on the "Alexrims" that came on mine sucks. Sealant goes underneath it and penetration into the wheel cavity. After hours of work, everything is sealed up and holding within 1 psi per day.

You definitely do not need to replace the oem tires to run tubeless, though the specialized on the rear was way easier to inflate and had no sidewall seepage. Specialized is definitely a better quality tire.
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bobbyh1wa
12-09-2022 at 12:30 PM.
12-09-2022 at 12:30 PM.
Quote from semjase :
The tires are fine but they DO REQUIRE SEALANT, the rim tape on the "Alexrims" that came on mine sucks. Sealant goes underneath it and penetration into the wheel cavity. After hours of work, everything is sealed up and holding within 1 psi per day.

You definitely do not need to replace the oem tires to run tubeless, though the specialized on the rear was way easier to inflate and had no sidewall seepage. Specialized is definitely a better quality tire.
I called the manufacturer and they said it is not tubeless ready but he said you could try. Sounds like from what you said it can be done with alot of work . I hope it holds for you.
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Joined Dec 2008
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SaintSimon
12-09-2022 at 03:19 PM.
12-09-2022 at 03:19 PM.
So excited to try out this new sync'r!

This is my second MTB and my first one was actually pretty good, a Diamondback Overdrive Pro 29er (Fox float fork with 100mm travel, Shimano Deore and XT components, but because I am on teh shorte side and sized for a small frame bike, the 29 inch wheels was not a good fit. Found out more about geometry and how the sync'r has more slack in the headtube angle so I am looking forward the the adjustments in the ride.

Now I have to sell off the first MTB, the overdrive pro....
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Joined Apr 2004
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> bubble2 851 Posts
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semjase
12-12-2022 at 08:17 AM.
12-12-2022 at 08:17 AM.
Quote from joeystalin :
Fork and tires. Aluminum stanchion fork will be alot lighter and probably starts at $450. You will notice lighter weight tires more readily, however. 1 lb of weight at the tire has exponentially greater reduction in rotational inertia than 1 lb of weight at the hub. Or pretty much anywhere else on the bike.
After about $200 in upgrades, my size L sync'r is 32.9 lbs actual weight loaded (pedals, cage, tubeless 3.0 front, 2.6 rear, 10 ounces sealant). This should be about 2 lbs lighter than stock.

Changes:
  1. Tubeless. Each tube was 13.5 ounces, but was replaced with about 5 ounces of sealant. So, 1.06 lbs savings total. (sealant will dry up and the tires will get lighter over time)
  2. Change from 3.0 to 2.6 rear tire, probably 0.2 lbs reduction.
  3. GX Crank and DUB hub: about 0.8 lbs reduction for about $110 total for the crankset with alloy gear, and bottom bracket.
  4. Swapped seat, about same weight. Diamondback Velo seat foam was awful.
  5. Added composite bottle cage
  6. Time Atac pedals (294 grams/pair) were only $39 with cleats
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Last edited by semjase December 12, 2022 at 08:35 AM.
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