The facts.
DescriptionThe whole story▼
Across this airbox's range the doubled-surface elements are dearer than their standard-size counterparts — noticeably so on the dust and extreme media. At the racing weave that stops being true. The two racing elements for these boxers carry the same list figure, one of them with a hundred per cent more filtering surface than the other. Where a difference costs nothing, the reasoning changes shape: the question is no longer whether the area is worth paying for, only whether the medium is.
Key Features
- Dry woven polyester from 22 µm threads, the highest-flowing cloth Sprint Filter makes
- Rated flow of 15,000 l/m²/sec, where the standard weave for this box carries 5,050
- A hundred per cent more filtering surface than the standard-size racing element
- Measured retention of 95.22 per cent against 100-micron test particles
- Exchanged straight for the factory panel, with no modification and no remap
- Serviced with compressed air, specified for the machine's life, two years of guarantee
The question that is left
Whether a racing cloth belongs in a touring boxer at all. It is the freest-flowing medium in the range, and the 85 in its name is not a pore size: in Sprint Filter’s own test it holds back 95.22 % of 100-micron particles against 93.13 % for the standard weave. That standard weave, at eighty microns, still passes more air than an RT has ever drawn. The case for the racing cloth here rests on circuit use, and outside that it is capacity nobody is calling on.
What a level figure does and does not settle
It settles the comparison between the two racing elements and nothing beyond it. Within that pair the larger surface is simply the better buy, since the medium, the fit, the care and the warranty are identical and only the interval moves. What it cannot settle is the comparison with the other media for this airbox, where the doubled area does carry a premium and the choice of medium is the real decision. Reading a level figure as a general recommendation is the mistake to avoid. And in no version of the comparison is this a power question: an element inside an unmodified airbox leaves a standard R 1200 RT exactly as strong as it was.
Care and cleaning
Nothing in the routine scales with the medium; only the minutes do. The load on a woven cloth sits where you can reach it, so an air line applied to the inner face and directed outwards returns the element close to where it started. Persistent road film is a job for hand-warm water and the smallest amount of mild detergent. What has no alternative is the drying: circulating air, no warmth from any source, no flame, and no refitting until the cloth is dry through. The K142S F1-85 goes in with nothing applied to it. Sprint Filter's servicing sheet is in the Downloads tab.
Fitment & Compatibility
Made for the BMW R 1200 RT of 2014 to 2018, replacing the standard panel in an unmodified housing. Six catalogue entries cover five machines here: the R 1200 RS and RT, and the R, RS and RT of the 1250 generation. Each is listed with its years in the Fitment tab.
DownloadsOwner's manual · brochure▼
FitmentWhich bikes this fits▼
- BMW R 1200 RS (2014–2018)
- BMW R 1200 RS (2015–2018)
- BMW R 1200 RT (2014–2018)
- BMW R 1250 R (2019–2023)
- BMW R 1250 RS (2019–2023)
- BMW R 1250 RT (2019–2023)
Questions, one topic at a time.
Get the real shipping cost for this item to your address — the same rates as checkout.
Choose a destination and hit Estimate — we fetch the live rates for this item.
We’re based in Germany. Standard delivery goes by DHL and national postal services and takes about 2–5 days within Germany, 1–2 weeks within the EU and 2–6 weeks outside the EU. Need it sooner? Express delivery reaches most of the world within a few days — just choose it at checkout where available.
Your exact shipping cost is calculated by destination and weight and shown at checkout before you pay — no hidden fees. Express delivery is selectable at checkout where available.
Yes, we ship to over 130 countries. Prices, taxes and delivery times for your destination are calculated automatically at checkout.
Within the EU, no — our prices already include all duties and EU VAT. For deliveries outside the EU (e.g. Switzerland, the UK or the USA), your order may be subject to import duties and taxes set by your country. These are collected by the carrier when your parcel arrives, aren’t included in our prices, and are outside our control.
As soon as your parcel ships we email you a tracking link, so you can follow it all the way to your door.
On out-of-stock items you can request a delivery time or leave your email to be notified the moment it returns — just use the notification box on the product.
You have the right to cancel within 14 days of receiving your order. Register your return by email first; once it’s approved you have a further 14 days to send the goods back. Items should be unused and in their original packaging.
Register your return by email with your order number before sending anything back, and we’ll send you the return instructions. Please note: returns that aren’t registered in advance can’t be accepted.
The quickest way is to place a new order for the size you need and register a return for the original by email — just let us know it’s an exchange.
We’re sorry — that shouldn’t happen. Contact us with your order number and a photo as soon as you can, and we’ll arrange a replacement or refund right away. Faulty goods are always covered by your statutory warranty.
Refunds go back to your original payment method, usually within 3–5 working days of your return reaching our warehouse.
PayPal, all major credit and debit cards (Visa, Mastercard, American Express), Klarna (pay later and instalments), Apple Pay, Google Pay and more — all processed securely via PayPal and Mollie.
Yes. Choose Klarna at checkout to split your purchase into flexible monthly installments.
Your payment is taken when you place your order. If you choose Klarna, you pay later according to Klarna’s terms.
Every payment runs over an SSL-encrypted connection through certified providers. We never see or store your full card details.
If your order hasn’t shipped yet, contact us as soon as possible and we’ll do our best to change or cancel it.
No — you can check out as a guest. An account simply lets you track orders and reorder faster.
For customers in the EU, prices are shown including your country’s local VAT. For customers outside the EU, prices are shown without VAT — instead, your country’s import taxes and duties may apply on delivery (see the customs question).
Yes. Your invoice is attached to your order confirmation email and is also available in your account.
Yes. We’re an authorised dealer, so every product is 100% original and comes with the full manufacturer warranty.
Yes. Everything we sell is genuine and comes with the manufacturer’s warranty, on top of your statutory rights. Keep your invoice as proof of purchase and contact us if you ever need to make a claim — we’ll help you through it.
Our team is happy to help. Use the contact button below and we’ll personally help you choose the right gear or part.
Measure your head circumference about one centimetre above your eyebrows and compare it with the size chart on this page. Between sizes? Choose the smaller one — the padding beds in with use.
Yes — it’s tested and approved to the current ECE 22.06 standard and road-legal across the EU.
Most of our touring and sport helmets are Pinlock-ready and many include the insert. Check the ‘What’s in the box’ section on this page for this model.
Yes — the cheek pads are channelled so the arms of your glasses slide in comfortably.
Take out the washable lining and hand-wash it in lukewarm water. Clean the shell and visor with a soft cloth and water only — never solvents.
Our team will personally help you choose the right gear or part — around 24h for a reply.