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Description
Piston Set by JE - 87mm +.50mm Oversize Bore | 11.5:1 CR | Stock Stroke - 89.6mm - S52 BMWNOTE: Image shown not actual parts. JE Pistons is the leader in forged racing pistons. With 70 plus years of experience, in house forging, and industry leading technology, JE Pistons are designed to perform at the top levels of all forms of motorsports. Bore (in) 3. 425 Bore (mm) 87. Top Compression Ring Thickness 0. 0400 Second Compression Ring Thickness 0. 0480 Oil Ring Thickness 0. 111 Forging Type FSR Volume (cc) 9. 90 Series JE Pistons Piston
NOTE: Image shown not actual parts.JE Pistons is the leader in forged racing pistons. With 70-plus years of experience, in-house forging, and industry-leading technology, JE Pistons are designed to perform at the top levels of all forms of motorsports.
Bore (in) 3.425
Bore (mm) 87.
Top Compression Ring Thickness 0.0400
Second Compression Ring Thickness 0.0480
Oil Ring Thickness 0.111
Forging Type FSR
Volume (cc) -9.90
Series JE Pistons
Piston Head Type Inv Dome/Dish
Pin Diameter (IN) 0.866
Compression Height 1.220
Make BMW
Wrist Pin Style - floating or press fit Floating
Wall Type CHAMFERED
Wall Thickness (IN) 0.150
Ringset Part Number JG1001-3425
Ring Brand ProSeal
Ringset Included Yes
Retainer Thickness 0.063
Retainer Lock Style Wire Lock
Retainer Lock Part Number 866-063-MW
Retainer Diameter (IN) 0.866
Replacement Single Piston 297173S
Replaced By 288991
Piston Pin Inside Diameter 0.566
Piston Pin Material 5115 LOW CARBON STEEL, CASE HARDENED
Piston Material 2618
Piston Pin Length (IN) 2.250
Piston Avg Wt 297
Pin Offset Yes
Pin Brand JE Pistons
Pin Part Number 866-2250-15-51C
Pin Included Yes
Pin Diameter (mm) 22.00
Oil Rail Support Included No
Deck Clearance 0.030
Brand JE Pistons
OE Part #: 11-25-1-405-702 / 11 25 1 405 702 / 11251405702
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 16 reviews
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Product Reviews
★★★★★ 5
Great shoe (but definitely runs large)!
Color: Reach for the Stars Cream, Size: 0-6 Months Infant
We love these shoes! Our very active little girl was getting blisters on her toes going barefoot, so we wanted some developmentally safe protection for her feet. Robeez shoes are backed by the American Podiatric Medical Association and fit the guidelines from the American Academy of Pediatrics. On top of that, these shoes are just a great product! They are easy for caregivers to put on, but difficult for babies to take off; the leather offers great grip and protection (no more blisters!), but are breathable enough to prevent sweaty feet; the top lip of the shoe doesn’t rub her ankle; the materials are quality (no staining/color transfer or weak stitches); and they are absolutely adorable to boot!! The only quibble I have is the innacurate sizing. The 0-6 month size I ordered fits my 10 month old’s feet perfectly. When I was shopping I measured her feet at 4.25-4.5 inches (11-11.5 cm), but ordered down a size based on reviews. I’m very glad I did! That small matter aside, I could not be more pleased with these little shoes!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 1, 2018
★★★★★ 5
Super cute
Color: Grey, Size: 12-18 Months Toddler
Super cute and so nice for when babies are first walking. They get softer every time baby wears them. Easy to put on and take off. Great quality and worth the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 11, 2026
★★★★★ 5
Perfect Soft Sole Shoes for New Walkers
Color: Briana Light Pink, Size: 12-18 Months Toddler
Robeez girl soft sole shoes are fantastic for new walkers. They’re lightweight, flexible, and fit snugly without slipping off. The soft soles provide just enough grip while allowing natural foot movement, which is important for developing balance and coordination. The cute designs are a bonus, making them easy to pair with any outfit. They’re easy to put on and stay comfortable throughout the day. Highly recommend for little ones just starting to walk!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 23, 2025
★★★★★ 4
Cute but small
Color: White Evie, Size: 12-18 Months Toddler
Very cute and high quality
Runs small
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 5, 2026
★★★★★ 5
Quality and cuteness
Color: Briana Light Pink, Size: 6-12 Months Infant
Adorable well made shoes. I’m a repeat customer. Make a great gift
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 18, 2026
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