Renthal Front Sprocket

$25.99 - $51.99
$23.39 - $46.99
4.90 out of 5 stars
Fitment Expert:
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Renthal Front Sprocket
Renthal Front Sprocket
  • Description
  • Reviews (84)
  • Q&A (17)
  • Fitment

When looking to replace your front sprocket, Renthal front sprockets are an easy choice because of their strength and inexpensive price tag.

  • Also known as "chainwheels", Renthal front sprockets are precision manufactured to withstand the rigors of supercross, motocross, and enduro racing.
  • Renthal Front Sprockets are made out of 655M13 nickel-chrome-molybdenum alloy steel. What does that mean to you? Ultimate strength and hardness.
  • Self-cleaning mud grooves prevent the build up of dirt.
  • Precision machining to extremely tight tolerances ensures that Renthal front sprockets are always within spec.
  • Note: Image is for reference only, actual product may vary.
4.9 out of 5 stars (84)
4.9 out of 5 stars
5 star   72
4 star   7
3 star   3
2 star   1
1 star   1
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Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Style
Verified Purchaser
Location: Phelan
chestnut250
Change to 14T front sprocket on 2012 CRF450R

Since I'm converting my 450R to a more desert/trail friendly machine one of the first changes I made was a gearing change. Going up 1 tooth on the front as apposed to several teeth in the rear made sense since the bikes stock gearing is setup for MX, which is way too close for trails or desert. The one tooth change in the front is fairly substantial. It is similar to making a 4 tooth change to the rear. The bike still pulls all 1st-5th gears without a problem. Top speed is higher which helps for valley crossing and 1st gear remains usable for extremely steep technical hill climbs. On my last trail ride I handled most hills in 2nd without having to downshift or bogging down in 2nd. 1st gear would be suited for National Hare and Hound 2nd loop uphills. Overall, it is a 5 star sprocket. It took about 5 minutes to install (I'm very mechanically inclined so may take others longer). Went on easy, perfect fitment, and didn't have to remove the chain. It is a good looking part, well machined. Packaging is very nice. Very durable and performs excellent. I definitely recommend this product.

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Style
Verified Purchaser
Location: Pensacola
Gman
Great Sprocket

Very durable and easy install

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Style
Verified Purchaser
Jwmell
Solid Sprocket

Got to my house quickly and went on the bike easily. Renthal makes great sprockets.

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Style
MrGoodberry
Great for Price!

I got this several months ago in order to gear my 2002 YZ85 down a few teeth, and it has been great. It was also very easy to install (I've had it on and off a few times now).

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Style
Verified Purchaser
Location: Imperial, NE, USA
MotoMD
Good and easy modification

Definitely makes a difference when trail riding. Used to bog a little going up hills and had to downshift to make it up steeper hills and no longer have to do that. It made my Honda CFR250L feel more like a true dirt bike than the stock gearing with this simple modification. Did decrease top speed a bit on this dual sport bike but still can easily cruise at 70 m.p.h. on the pavement when needed. Cheap, easy modification with definite benefits you can feel.

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Style
Verified Purchaser
Location: DeWitt, IA 52742, USA
DBoy87

Seems good.

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Style
Verified Purchaser
Harry
Good sprocket

very easy to install, i now have 3 of these because theyre very easy to install and change the feel of the bike completely. all 3 have fit perfect.

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Style
Verified Purchaser
Location: New Mexico
dakota

Works gteat and strong in the sand. Will use another if i need to. Even got it in 2 days with normal shipping

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Style
Verified Purchaser
Location: Portland, TN, USA
WoodsRiderEnthusiast
Great Product

Great machining and fit perfectly. Best investment/improvement I've made yet.

Overall 5 out of 5 stars
Durability
Ease of Installation
Performance
Style
Verified Purchaser
Location: Kennewick, WA, USA
23X68
Renthal sprocket

My last sprocket was cheaper but broke 2 teeth on the first ride,this sprocket has about 500 miles on it and no signs of wear.ill buy renthal sprockets from now on.

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Kxrider 1 month 29 days ago
Which way is the sprocket supposed to face on a kx85 the words out or in?
MotoSport Staff Expert
1 month 28 days ago
MotoSportExpert
Generally the writing/numbers will face out. If the sprocket has different length flanges on each side you want to make sure it goes on the same as the old sprocket or as specified in your service manual.
isiah 2 months 19 days ago
What kind of attachment holds the front sprocket on for a 2003 cr85? and does it come with this product?
Expert MotoSport Staff
2 months 19 days ago
MotoSportExpert
On the 2003 Honda CR85 the front sprocket is held to the counter shaft with a fixing plate and two bolts. The Renthal Front Sprocket does Not come with the hardware, however it can be found in our OEM section here: http://www.motosport.com/dirtbike/oem-parts/honda/2003/cr85/transmission
Chuck 4 months 21 days ago Location: Millville, NJ, USA
How to reduce torque on a 2011 KTM 50sx?
Currently running a 10 tooth front sprocket and 42 tooth rear sprocket. Which one should I change to lower the torque on the bike. Daughter gets jerked when she gets on the gas.
MotoSport Staff Expert
4 months 20 days ago
MotoSportExpert
For less bottom end power and more top end you would want to go down on the rear sprocket and/or up in the front. Remember 1 tooth in the front is equal to about 3 in the rear. Feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
4 months 7 days ago Location: Phelan
chestnut250
To reduce torque (spread out the gearing) you would want to increase the size of the counter-sprocket (front sprocket connected to engine, sometimes called the drive sprocket) or decrease the rear sprocket (Large sprocket attached to wheel hub, sometimes called the driven sprocket). Keep in mind the bike will accelerate slightly slower but will also have a higher top speed. Another thing to consider is you may want to stick to changes on the sprocket, not counter-sprocket. Counter-sprocket changes are BIG changes and you can get much more gradual changes with the driven sprocket. Something else you may want to check before changing gearing is the chain tension. You say the bike jerks when she gets on the gas, that is usually a sign of a loose or stretched chain. Be sure to adjust this to the manufacturer recommendation with is usually about 1" to 1 1/4" of free play.
Trailrider Over 5 months ago Location: Colorado
Would changing the sprocket size on a 07 ktm105sx help with trail riding?
We trail ride the most and I know a trail bike would be better overall however we like the weight and size of the 105. Would changing the sprocket size set the bike up better for trail riding? Any recommendations on a good ratio or size for front and rear. I believe the stock size is 14 in the front and 49 in the back.
Expert MotoSport Staff
Over 5 months ago
MotoSportExpert
Yes you can definitely gear your 2007 KTM105SX to work better on the trails. Going up on the rear and/or down on the front will give you more bottom end. I would recommend searching the forums to find out what gearing is working best for trails on the 105SX.
atv449 Over 10 months ago Location: Pittsburgh, PA, USA
Best setup for mx front and rear sprocket?
running stock right now
Top 1 Contributor
Over 10 months ago
MotoSportExpert
Motosport.com only list the stock gearing for your Yamaha YFZ450. As a general rule of thumb to get more acceleration (less top speed), you will want to either drop teeth in the front or add to the rear sprocket. To increase top speed, you do the opposite.
Ryanrysn 1 year 1 month ago
If I have a 13 on my bike and a 53 on the back if I do 12 in front and 52 on back will I have more touque and more top end at the same time?
Expert Top 1 Contributor MotoSport Staff
1 year 1 month ago
MotoSportGrantK
You can either gain acceleration or top speed, not both. 13-53 gives you a gear ratio of 4.08, going with 12-52 will give you a gear ratio of 4.33 giving you more slightly more acceleration and less top speed. Also, feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.
4 months 7 days ago Location: Phelan
chestnut250
No. It is impossible to get both more torque AND more top end with sprocket changes. The only way to accomplish this is to change the bikes transmission gearing (1st gear ratio, 2nd gear ratio, and so on) and even with this you could only accomplish more torque on the bottom and more top end in the higher gears. It is a give and take. With sprockets if you want more torque you sacrifice top end. If you want more top end you sacrifice torque. I hope this helps.
KeeKee 1 year 7 months ago Location: Canada
Need a front sprocket to fit 1995 Polaris Xplorer 400 front?
this takes a 520 chain
MotoSport Staff Expert
1 year 7 months ago Location: Portland, OR, USA
MotoSportRyanT
Unfortunately, I do not show any aftermarket sprocket options that would fit your 1995 Polaris Xplorer 400. I would recommend ordering the direct OEM replacement sprocket from Polaris for that. The OEM diagrams with that sprocket can be found here: http://www.motosport.com/utility/oem-parts/POLARIS/1995/XPLORER/GEARCASE-ASSEMBLY-XPLORER-4X4-W959140
bobthebuilder 1 year 10 months ago
Were can I get a sprocket that will fit my 91 trx350? or will I have to have one made. If so what is the specs?
Putting my fourwheeler engine on a gocart
MotoSport Staff
1 year 10 months ago Location: Portland, OR, USA
MotoSportExpert
The 2001 TRX350 is shaft driven model, sprockets are not available for this model.
Hendu Over 5 years ago Location: Spokane, Washington
Don't you take a tooth off the front sprocket or add teeth to the back sprocket to gain low end and in turn loose top end?
Top 500 Contributor Top 1000 Contributor
Over 5 years ago Location: Austin, TX
MotoX331
YES. Adding a tooth to the rear sprocket on a bike will provide more "low end" and reduce "top end". The reverse is also true when removing teeth from the rear sprocket. The front sprocket is the exact opposite of the rear but each tooth has more of an impact. For example, dropping 1 tooth on the front sprocket is roughly the equivalent of ADDING 2-21/2 to the rear sprocket.
2 years 1 month ago Location: PA
NastyNate
yes. Depending on how much low end you want dropping a tooth in the front may be too much. For every tooth you lose in the front it is equal to almost 3 teeth gained in the rear. Sprockets are cheap. You might want to start out dropping a tooth in the front and if you find that is too much, you can always drop a tooth or two in the rear in addition to the smaller front.
Zacky Over 5 years ago
I want more low end power.?
What should i put on my 2004 CRF 250R to give it a wider gear ratio and more low end power?
Over 5 years ago
raptorscott
For more torque you make the front smaller and the back bigger but kills your top end speed. For more top end speed you make the front bigger and make the back smaller and kills you torque. I'm not sure the ratios would be but for my YZ125 i put a 52 tooth on the back and made a big difference with getting up hills easier.
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