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Ships within 48 hours · Estimated delivery Aug 16 - Aug 21
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Description
Speedline Parts | Killer Buzz CNC Machined Cro-mo Rear DriverThe Speedline Killer Buzz Hub comes pre loaded with a 7075 T 6 Aluminum Driver for the ultimate in lightweight performance, but sometimes you need the extra strength that the bigger riders are putting out. If you know you have the extra horsepower, you know you need one of the Cro mo drivers. The heat treated cro mo driver maximizes the lock up and ensures a positive drive with only adding a few extra grams. The Speedline Killer Buzz Cro mo driver
The Speedline Killer Buzz Hub comes pre-loaded with a 7075 T-6 Aluminum Driver for the ultimate in lightweight performance, but sometimes you need the extra strength that the bigger riders are putting out.If you know you have the extra horsepower, you know you need one of the Cro-mo drivers. The heat treated cro-mo driver maximizes the lock up and ensures a positive drive with only adding a few extra grams.
The Speedline Killer Buzz Cro-mo driver even comes pre-loaded with precision sealed bearings so it is the easiest swap you can imagine. Instant power transfer engagement.
Same spline pattern to accept Shimano® compatible cogs.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.6 ★★★★★
Based on 22 reviews
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Product Reviews
★★★★★ 4
Great for small dogs
Color: Four colors, Size: 5cm (ball only)
Durability
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Reviewed in the United States on February 28, 2026
★★★★★ 5
Comfortable & Ideal
Color: 2 Pairs: Black
As a hot sleeper, I could never wear regular socks to bed, so I thought I’d try these. They have been comfortable and ideal for my needs. They’re easy to slip on and I take them off before I get out of bed. They’ve been great and my heels look WAY better after just 3 nights. Happy with the purchase!
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Reviewed in the United States on May 10, 2026
★★★★★ 5
Great buy for rough heels
Color: Gray
These work great on hubby's feet which are always so dry. Just have to be consistent. They fit great and are comfortable he says.
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Reviewed in the United States on May 12, 2026
★★★★★ 5
Works and good quality...will last
Color: 2 Pairs: Black
Worked overnight
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Reviewed in the United States on May 26, 2026
★★★★★ 4
Works well
Color: Gray
Makes my heels super soft in addition to applying lotion
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Reviewed in the United States on March 1, 2026