• Women's Karhu Synchron Ortix F200319 saggital
  • Women's Karhu Synchron Ortix F200319 rear
  • Women's Karhu Synchron Ortix F200319 front
  • Women's Karhu Synchron Ortix F200319 medial
  • Women's Karhu Synchron Ortix F200319 top view
  • Women's Karhu Synchron Ortix F200319 outsole

    $160.00 F200319




    Drop 8 mm

    Weight 10.6 oz

    Weight 301 g


    Select size

    New to the Synchron? The Synchron fits true to size.

    Please select a size

    The women's Karhu Synchron 2021 is a premium cushion daily trainer for runners who are neutral or mid to late-stage overpronators. The Synchron gives you a soft and stable ride with a smooth, supportive transition.


    -Anatomical lacing system for micro-adjustments
    -Full-length fulcrum for a stable ride
    -Cushioned AeroFoam Nova midsole
    -Ideal Knit mesh construction for breathability and support
    -Seamlessly engineered upper
    -Open-cell foam insole for a plush feel

    The women's Karhu Synchron is a premium cushion daily trainer for runners who are neutral or mid to late-stage overpronators. The Synchron gives you a soft and stable ride with a smooth, supportive transition.

    The Synchron 2021 utilizes advanced midsole materials to offer the softest Karhu collection. The redesigned internal Fulcrum unit is more flexible than before which accentuates the cushion and improves the transition. The adjusted upper moves easily with the foot and accommodate a broader range of foot shapes. Newly added is the open-cell foam insole for a plush feel.

    -½ length Fulcrum 
    -Ortix Fit
    -Open-cell foam insole

    Weight US8: 300g / 10.5 oz
    Heel-to-toe drop: 8mm

    Your order is prepared for shipment on business days the next morning after you placed your order. Typically, the warehouse is able to manage and send out your order the same day, or the next morning after they start processing it!

    Delivery & Returns


    We ship orders with in the USA, Mexico, Canada, Australia and New Zealand only. All web orders are shipped from Fife, WA. If you would like to obtain a proof of delivery email us separately, any lost packages or items must be claimed with the carrier selected for the shipment. Please note that during national holidays in the USA we aren't shipping. 

    We allow 48 hours for order processing after order placement. This is rare but can occur during peak shipping seasons. All tracking information is emailed 24 hours after the order is shipped.

     Country Transit time Carrier Duties & Taxes

     3 to 7 working days

    Express shipping in the check-out available.

    UPS Paid by Karhu
    MX *** 7-21 working days USPS Paid by Receiver
    CA *** 7-21 working days USPS Paid by Receiver
    NZ *** 7-21 working days USPS Paid by Receiver
    AU *** 7-21 working days USPS Paid by Receiver


    * For shipping to Alaska, Puerto Rico, Hawaii, AFA, AFE and AFP there is a different shipping of $14.95. 

    ** Orders valued more the $100.- will ship Economy Free of charge. Otherwise there will be a shipping fee of $7.95.

    *** Orders shipped outside of the United States are charged a shipping fee of $29.95.



    Returns may be mailed to us within 30 days of receipt with the product and packaging in proper condition. Unless the goods were sold with a discount, all discounted sales are final no returns are possible.

    If you choose to return your product from within the USA for a refund, we will provide a prepaid return-shipping label and a refund for the amount you paid for your purchase, minus a $5.00 restocking fee per item returned. 

    If you choose to return your product from outside of the USA for a refund, you will have to return the product at your own expense. We will issue a refund for your purchase, minus a $5.00 restocking fee per item returned.

    Only product purchased directly www.karhu.com can be returned to our return processing center. Any unauthorized return of Karhu product will not be accepted or processed at our processing center. The sender of unauthorized returns will be responsible for all return shipment costs.

    Return shipment may be sent to:

    Regal Logistics
    6500-26th Street East
    Fife, WA 98424 United States of America

    Accompanied by this return form: download here

    Important: Product must be clean and the box in proper condition to be accepted.

    Under garments such as briefs, boxers, undershorts, underpants may not be returned for size exchange or refunds due to hygienic reasons we can not restock these items.

    All sneakers must be in the condition you received them and in the original box.
    Warranty related product returns must be shipped to the same address as listed above. All products returned for warranty related reasons will be inspected upon the return of the product.

    Please allow 2-3 weeks for processing.

    For shipments outside the US or special regions Karhu won't provide a return label. We do except your return taking into account the conditions mentioned above. Please note that you ship your return Duties and Taxes paid. 

    New to the Synchron? The Synchron fits true to size.

    Size Guide Running Women

    STEP 1

    Place a piece of paper on the floor with one end against the wall. Put your foot on the piece of paper with your heel against the wall.

    STEP 2

    Take a pencil and mark the end of your longest toe on the paper. Repeat for your other foot.

    STEP 3

    Measure in cm from the wall (heel) to the longest point (toe). Take the larger measurements. Than take what you measured + 0.5 CM and compare it with our shoe sizes in the size chart.


    Feet size (in CM) US womens size EU size UK size
    22.5 5 35.5 3
    22.9 5.5 36 3.5
    23.4 6 37 4
    23.8 6.5 37.5 4.5
    24.3 7 38 5
    24.6 7.5 39 5.5
    25.1 8 39.5 6
    25.5 8.5 40 6.5
    25.9 9 40.5 7
    26.3 9.5 41.5 7.5
    26.8 10 42 8
    27.2 10.5 42.5 8.5
    27.6 11 43 9
    More Reviews


    Customer Reviews

    Based on 6 reviews
    Strong Support for Side of foot

    I really appreciate these shoes. Unlike other brands, they have strong support for the outer side of my foot. This supports my balance and reduces the chance of falls. I just wish you had a few more color options!

    Jessica Benintendi
    No response

    The shoes were too small even though I used the online guidance. I emailed to get a return label twice with no response.

    Beth Eubank
    Karhu shoes

    Like fit and comfort- love color -

    Shane Jakober
    Great shoe

    I love these shoes! I have incredibly difficult-to-fit feet, but these felt great right out of the box. I did have to go up a half size, as recommended by the salesperson at the shoe store. Why I like them? They are comfortable, look stylish with jeans and the blue color is attractive. They also seem to be wearing well and should last me a lot longer than my other running shoes I’ve bought for daily use and walking.

    Mary Tenner
    Synchron 2021

    These shoes are incredibly comfortable. They fit perfectly and cushion my feet so well. I love these shoes so much that I don’t want to take them off at the end of the day when it’s time to go to sleep.


    The KARHU Fulcrum technology is designed to keep all forces going forward, reducing braking forces and using your body's natural energy to create a smoother ride. It's what whe call the Rolling Effect. Fulcrum Technology provides: Balanced Cushioning, Increased Support, More Energy. The Synchron features a full length stingray fulcrum.

    Karhu US
    Karhu US

    OrtixFit shapes your mid sole and upper volumes using data directly collected from over 2 Million runner's feet. What started in 2018 with the launch of the Karhu Ikoni the 1st model shaped by ORTIX, we now offer all our footwear models with our ORTIX Fit, based on actual scanning data in regular, HiVo (more volume) and Hera (women specific) Fit volumes. Karhu collaborates with Volumental(TM) and Fleet Feet(TM) create personalized fit experiences.

    Karhu US
    Karhu US

    Our proprietary midsole foam: lighter, more resistant to temperature changes and better cushioning than EVA.

    Karhu US
    Karhu US

    The M-lock side panels help secure the shoe around the foot while an inner booty construction remains straight.

    Karhu US
    Karhu US


    Karhu US





    Karhu US





    Karhu US