bmw gear ratios KMP - 3.91 Final Drive/Ring & Pinion
SKU: 26517440654
bmw gear ratios

bmw gear ratios KMP - 3.91 Final Drive/Ring & Pinion

$25.60 $28.44
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Description

bmw gear ratios KMP - 3.91 Final Drive/Ring & PinionKMP has produced a stronger, but also lighter final drive for the BMW 210 differential with a ratio of 3. 91. The BMW 210 with 3. 91 ratio suits most BMW E36 M3, E46 M3, E9X M3, E34 M5, E39 M5 and more. The crown wheel has M14 threads (10x). Always check which model type is needed. Benefits of a Motorsport Final Drive Longer lifetime of gears Specifically designed for motorsport Less teeth for more strength Stronger material compared to OEM Light

KMP has produced a stronger, but also lighter final drive for the BMW 210 differential with a ratio of 3.91. The BMW 210 with 3.91 ratio suits most BMW E36 M3, E46 M3, E9X M3, E34 M5, E39 M5 and more. The crown wheel has M14 threads (10x). Always check which model type is needed.

Benefits of a Motorsport Final Drive

  • Longer lifetime of gears
  • Specifically designed for motorsport
  • Less teeth for more strength
  • Stronger material compared to OEM
  • Light weight
As a rule of thumb you can check the number of bolts on the side cover of the casing.
210: 8 Bolts
188: 6 Bolts
168: 4 Bolts
188K/L: No bolts

If you are not sure which type of Final Drive you need, please contact our sales department for assistance.

Vehicles Supported
BMW E36 M3 (3.2L)
BMW E46 M3
BMW E9X M3
BMW E39 M5
BMW E85/E86 Z4M

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 26517440654

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Nancy Ames
Bozeman, US
★★★★★ 5
Sturdy back chair
Color: Khaki
This chair is beautiful and very comfortable. My daughter wants it. My son put it together in half an hour. Thank you
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Reviewed in the United States on June 9, 2026
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Ricardo
Lowell, US
★★★★★ 3
Backrest does not adjust in and out
Color: Black
Very comfortable but I wish the back rest was adjustable. It’s too far back to offer any support.
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Reviewed in the United States on April 2, 2026
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Tram
Dallas, US
★★★★★ 5
Excellent value for money!
Size: 934W-Z, Color: Black, Size: 934W-Z, Color: Black
I absolutely love this office chair! I needed a chair that could support my standing desk without sacrificing comfort, and this one completely exceeded my expectations. It's incredibly sturdy and durable, well-made, and the height adjustment is super convenient, making it easy to find the perfect fit. Even during long hours of work, the seat is comfortable, and the ergonomic design effectively reduces pressure on my back and legs. I love its clean, modern look—it fits my home office perfectly. Assembly was quick and easy, and for this price, the quality is absolutely fantastic!
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Reviewed in the United States on February 24, 2026
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Lisa Bjornstad
Belleville, US
★★★★★ 5
Perfect chair!
Size: 934-Z, Color: Blue, Size: 934-Z, Color: Blue
I have an adjustable-height desk (also purchased from Amazon) and needed a drafting chair for those times when my body gets tired of standing. This chair fits the bill and then some! I put it together myself; it took me about an hour, but would take me about half that next time, since now I know what to do (and what NOT to do!). All the parts were there; there are even spare parts (see photo). All the holes were drilled in exactly the right places, too, which isn't always the case when I buy things from Amazon (my standing desk is a great example). The chair fits me; I'm short (5'3.5"), and often the seats of furniture are too deep for me to rest my feet flat on the floor. The depth of the seat on this chair is just a little over 18 inches, and with the adjustable footrest ring, it's perfect. I don't think a tall or heavy person would fit in it, to be honest. But it's perfect for those of us who are vertically challenged. I love that it glides easily on my hardwood floors and that it turns 360 degrees. The chair comes in numerous luscious colors, so take your pick! It is very sturdy, has good lumbar support, and the seat and seat back are very comfortable. And the arms flip up, which was an absolute must when I was shopping for this chair. I got it on sale, too -- $109.00 -- and I'm delighted with this purchase.
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Reviewed in the United States on April 23, 2026
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PenLady
Port Orchard, US
★★★★★ 5
Excellent adjustable drafting chair
Size: 934-Z, Color: Blue
Excellent chair design, extremely comfortable and exceptionally easy instructions to follow making for simple assembly. Love the amply wide cushioned seat and ergonomic backrest. The height adjustment feature works perfectly as well as positioning of the foot ring . Having the ability to raise the arms is also a big plus! I highly recommend this product for attractive appearance, comfort features, functionality and operation. Really nice chair!
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Reviewed in the United States on April 13, 2026

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